The John Deere S7 Series has four models, but the lineup makes more sense when you stop thinking of it as four evenly spaced combines.
There are really two groups.
The John Deere S7 600 and S7 700 use Deere’s 9.0 L JD9 engine, carry 300 bushels of grain, and use the smaller 54.9-square-foot cleaning system.
The John Deere S7 800 and S7 900 move to the 13.6 L JD14 engine, 400-bushel grain tanks, a larger 63.5-square-foot cleaning system, and available Active Concave Isolation for difficult harvesting conditions.
That distinction is more useful than simply looking at horsepower.
The jump from S7 600 to S7 700 is mainly more engine power and faster unloading.
The jump from S7 700 to S7 800 changes much more of the combine.
Then S7 800 to S7 900 returns to a simpler question: do you need another 77 maximum horsepower from essentially the same upper-S7 platform?
For a Prairie grain farm, those are the differences that matter.
This guide compares all four S7 combines, explains what actually changes between them, and looks at which model makes sense for different harvest workloads.
John Deere S7 Series Quick Comparison
| Specification | S7 600 | S7 700 | S7 800 | S7 900 |
|---|---|---|---|---|
| Engine | JD9 | JD9 | JD14 | JD14 |
| Displacement | 9.0 L | 9.0 L | 13.6 L | 13.6 L |
| Rated power | 333 hp | 402 hp | 473 hp | 543 hp |
| Maximum power | 382 hp | 460 hp | 540 hp | 617 hp |
| Rated engine speed | 2,200 rpm | 2,200 rpm | 2,000 rpm | 2,000 rpm |
| Fuel capacity | 250 gal. | 250 gal. | 330 gal. | 330 gal. |
| Grain tank | 300 bu | 300 bu | 400 bu | 400 bu |
| Peak unloading | 3.6 bu/s | 4.2 bu/s | 4.2 bu/s | 4.2 bu/s |
| Rotor diameter | 30 in. | 30 in. | 30 in. | 30 in. |
| Rotor length | 123 in. | 123 in. | 123 in. | 123 in. |
| Concave area | 11.8 sq. ft. | 11.8 sq. ft. | 11.8 sq. ft. | 11.8 sq. ft. |
| Cleaning area | 54.9 sq. ft. | 54.9 sq. ft. | 63.5 sq. ft. | 63.5 sq. ft. |
| Active Concave Isolation | No | No | Available | Available |
| Base weight, no header | 43,006 lb | 43,752 lb | 49,141 lb | 49,141 lb |
The table immediately shows something that is easy to miss when looking at four separate model pages.
John Deere does not increase every part of the combine each time the model number goes up.
Some steps are mostly about power.
Others change the basic capacity of the machine.
That is why the S7 700 to S7 800 jump deserves much more attention than the model numbers alone suggest.
The S7 Lineup Is Really Two Platforms
The easiest way to understand the S7 Series is to divide it in half.
S7 600 and S7 700
These two machines share:
- JD9 9.0 L engine architecture
- 300-bushel grain tank
- 250-gallon fuel capacity
- 30-inch by 123-inch rotor
- 11.8-square-foot concave area
- 54.9-square-foot cleaning area
- similar base machine weight
- no Active Concave Isolation
The biggest differences are engine output and unloading speed.
S7 800 and S7 900
These two share:
- JD14 13.6 L engine architecture
- 400-bushel grain tank
- 330-gallon fuel capacity
- 30-inch by 123-inch rotor
- 11.8-square-foot concave area
- 63.5-square-foot cleaning area
- available Active Concave Isolation
- the same listed base weight of 49,141 lb
- the same 4.2 bu/s peak unloading rate
The main specification difference between them is horsepower.
This gives the lineup a clear pattern:
S7 600: entry into the current S7 family.
S7 700: more power within the lower S7 architecture.
S7 800: major step into the upper S7 architecture.
S7 900: maximum S7 engine power within that upper architecture.
That is a much better way to choose between them than assuming each model is simply one size larger than the previous one.
Engine and Horsepower Comparison
The four S7 models cover a wide range of engine output.
| Model | Rated HP | Maximum HP | Difference From Previous Model |
| S7 600 | 333 | 382 | Starting point |
| S7 700 | 402 | 460 | +78 max hp |
| S7 800 | 473 | 540 | +80 max hp |
| S7 900 | 543 | 617 | +77 max hp |
Interestingly, the maximum horsepower steps are remarkably consistent.
The difference is what happens around the engine.
S7 600 to S7 700
Maximum power increases by 78 hp, but the engine displacement, grain tank and cleaning area stay the same.
S7 700 to S7 800
Maximum power increases by another 80 hp, but this time the engine changes from 9.0 to 13.6 litres, grain capacity increases from 300 to 400 bushels, fuel capacity grows, the cleaning system gets larger, and Active Concave Isolation becomes available.
S7 800 to S7 900
Maximum power rises another 77 hp, but most of the surrounding hardware remains the same.
That makes the middle step fundamentally different from the other two.
S7 600 vs S7 700
The S7 600 and S7 700 are the closest pair in the lower half of the lineup.
| Specification | S7 600 | S7 700 |
| Engine | JD9 9.0 L | JD9 9.0 L |
| Rated power | 333 hp | 402 hp |
| Maximum power | 382 hp | 460 hp |
| Fuel capacity | 250 gal. | 250 gal. |
| Grain tank | 300 bu | 300 bu |
| Peak unloading | 3.6 bu/s | 4.2 bu/s |
| Cleaning area | 54.9 sq. ft. | 54.9 sq. ft. |
| Base weight | 43,006 lb | 43,752 lb |
The S7 700 adds a substantial amount of horsepower without changing the basic size of the grain-handling system.
It also improves peak unloading from 3.6 to 4.2 bu/s.
That makes the S7 700 particularly interesting for a farm that likes the size and 300-bushel configuration of the S7 600 but needs more reserve in heavier crop.
Choose the S7 600 when:
- 382 maximum horsepower is enough for the expected crop flow
- a 300-bushel tank fits the grain-cart cycle
- the operation does not regularly push the combine near its engine limit
- keeping machine size and weight lower matters
- the extra power of the S7 700 would rarely be used
Step to the S7 700 when:
- heavy crop regularly demands more engine reserve
- unloading on the go makes the faster 4.2 bu/s system useful
- the same 300-bushel tank still works for the operation
- the farm wants the highest-powered JD9 model before moving to the larger JD14 platform
For many farms, this is a very straightforward comparison.
If horsepower is the main limitation of the S7 600-sized platform, the S7 700 answers that problem without moving to a physically larger upper-S7 machine.
S7 700 vs S7 800
This is the most important comparison in the entire S7 lineup.
The change from S7 700 to S7 800 is much more than another 80 horsepower.
| Specification | S7 700 | S7 800 |
| Engine | JD9 9.0 L | JD14 13.6 L |
| Rated power | 402 hp | 473 hp |
| Maximum power | 460 hp | 540 hp |
| Rated speed | 2,200 rpm | 2,000 rpm |
| Fuel capacity | 250 gal. | 330 gal. |
| Grain tank | 300 bu | 400 bu |
| Peak unloading | 4.2 bu/s | 4.2 bu/s |
| Cleaning area | 54.9 sq. ft. | 63.5 sq. ft. |
| Active Concave Isolation | No | Available |
| Base weight | 43,752 lb | 49,141 lb |
This is where the S7 Series changes character.
The S7 800 gets:
- a 13.6 L JD14 engine
- 80 more maximum horsepower
- 100 more bushels of grain capacity
- 80 more gallons of fuel
- a larger cleaning system
- Active Concave Isolation availability
- additional machine weight
That is why comparing S7 700 and S7 800 based only on their 460 and 540 hp figures misses most of the story.
The S7 800 is not just faster
The 400-bushel tank changes how long the combine can stay between unloads.
The larger cleaning area gives the machine more room to handle the crop volume coming out of the rotor.
Active Concave Isolation targets difficult material flow in tough harvesting conditions.
And the JD14 provides substantially more engine reserve.
This is the point where a farm should stop asking, “Would more horsepower be nice?” and start asking, “Can our entire harvest operation support the larger machine?”
Step from S7 700 to S7 800 when:
- 300 bushels is becoming too restrictive
- the combine is regularly operating near its practical crop-processing limit
- tough wheat or canola is common
- the farm can use Active Concave Isolation
- grain carts can handle the larger 400-bushel cycle
- trucks and storage can keep up with additional throughput
- the extra machine weight is acceptable
For a large Prairie grain operation, this may be the most meaningful step anywhere in the S7 range.
S7 800 vs S7 900
The S7 800 and S7 900 comparison is almost the opposite.
On paper, they share most of the major hardware.
| Specification | S7 800 | S7 900 |
| Engine | JD14 13.6 L | JD14 13.6 L |
| Rated power | 473 hp | 543 hp |
| Maximum power | 540 hp | 617 hp |
| Fuel capacity | 330 gal. | 330 gal. |
| Grain tank | 400 bu | 400 bu |
| Peak unloading | 4.2 bu/s | 4.2 bu/s |
| Rotor | 30 x 123 in. | 30 x 123 in. |
| Cleaning area | 63.5 sq. ft. | 63.5 sq. ft. |
| Active Concave Isolation | Available | Available |
| Base weight | 49,141 lb | 49,141 lb |
This makes the decision unusually clear.
The S7 900 provides another 77 maximum horsepower.
Everything else in this comparison is remarkably close.
When does the S7 900 make sense?
When engine power is genuinely one of the things holding the S7 800-sized platform back.
Heavy crop flow, residue chopping, unloading and difficult conditions can all demand power at the same time.
If the S7 800 regularly operates at a high engine load while the rest of the machine and harvest logistics still have room, the extra power of the S7 900 can be valuable.
If the S7 800 is already limited by the grain cart, cleaning losses, header, field layout or trucking, an additional 77 hp may add very little.
This is probably the most important takeaway from the S7 800 vs S7 900 comparison.
The S7 900 is not automatically a better choice simply because it sits at the top of the lineup.
It is the better choice when the farm specifically needs more engine reserve from the upper-S7 platform.
S7 600 vs S7 900
Comparing the two ends of the range shows just how broad the S7 family has become.
| Specification | S7 600 | S7 900 |
| Engine | JD9 9.0 L | JD14 13.6 L |
| Rated power | 333 hp | 543 hp |
| Maximum power | 382 hp | 617 hp |
| Grain tank | 300 bu | 400 bu |
| Peak unloading | 3.6 bu/s | 4.2 bu/s |
| Fuel capacity | 250 gal. | 330 gal. |
| Cleaning area | 54.9 sq. ft. | 63.5 sq. ft. |
| Base weight | 43,006 lb | 49,141 lb |
The S7 900 has 235 more maximum horsepower.
But that does not mean it should be thought of as simply a faster S7 600.
It is meant for a different workload.
A farm that can comfortably finish harvest with an S7 600 has little reason to carry the operating capacity of an S7 900.
A large operation that would consistently overwhelm an S7 600 should not choose it simply because it is the smallest current S7.
The right model is the machine that matches the farm’s actual bottleneck.
All Four S7 Models Use the Same Basic Rotor Size
One of the most surprising facts in the S7 comparison is that all four machines list the same basic rotor dimensions:
30 inches in diameter and 123 inches long.
Rotor speed range is also the same:
- Low: 210-530 rpm
- High: 400-1,000 rpm
Concave area remains 11.8 square feet.
This raises an obvious question.
If the rotor dimensions are the same, how does Deere increase capacity as you move through the lineup?
The answer is that combine capacity is not determined by rotor size alone.
As the S7 range grows, Deere changes or adds capacity around the rotor through:
- higher engine output
- larger cleaning area on S7 800 and S7 900
- larger grain tanks on the upper models
- Active Concave Isolation on S7 800 and S7 900
- additional separating area in the upper machines
- greater fuel capacity
- automation that helps keep the combine more consistently loaded
That is a much more useful way to understand the lineup.
TriStream vs Variable-Stream Rotor
John Deere discusses two rotor approaches for the current S7.
TriStream Rotor
The TriStream rotor is standard equipment and is aimed particularly at high-volume coarse-grain harvesting.
Its tapered front section and spiral vanes are intended to move crop smoothly into and through the threshing area.
For corn and soybean operations, this is the more natural configuration.
Variable-Stream Rotor
The Variable-Stream Rotor is particularly relevant to Western Canadian farms.
John Deere recommends it for difficult small-grain and rice conditions.
Adjustable top-cover transport vanes change how quickly material moves through the rotor.
That lets the operator retain crop longer when additional threshing or separation is needed, or move it through faster when conditions allow.
Deere also notes that adjusting the vane angle can reduce stress on straw.
For wheat, barley, oats and canola, this flexibility can be more important than simply looking at maximum rotor rpm.
A crop that moves easily at 3 p.m. can become noticeably tougher several hours later.
Which S7 Is Best for Wheat?
There is no single S7 that is automatically best for wheat.
The deciding factor is how much wheat the farm needs to process and how difficult the normal harvesting conditions are.
S7 600
A reasonable fit when acreage and crop volume do not require the upper models.
It still provides the same basic 30-inch rotary architecture and can use Deere’s small-grain-focused technology.
S7 700
Makes sense when the lower platform is still adequate but the farm needs more engine reserve.
Its 460 maximum horsepower gives substantially more room than the S7 600 without moving to the heavier upper platform.
S7 800
This is where the S7 becomes particularly interesting for larger wheat operations.
The bigger cleaning system, 400-bushel tank, JD14 engine and available Active Concave Isolation all become useful when crop flow is consistently high or straw is difficult.
S7 900
Best justified when an S7 800-sized machine still needs more power.
For farms working heavy wheat through long days and using large headers, the extra engine reserve can make sense.
The key is not choosing the biggest wheat combine.
It is choosing the smallest machine that can comfortably handle the farm’s worst realistic harvest workload.
Which S7 Is Best for Canola?
Canola makes combine selection especially interesting because crop conditions can change quickly.
Dry standing canola may feed relatively easily.
As moisture rises, straw can become tougher and engine demand can climb.
This is where the upper S7 features become more meaningful.
John Deere specifically references canola when discussing its Dyna-Flo Plus cleaning system and Active Concave Isolation.
Deere states that Dyna-Flo Plus can provide 14 percent more capacity in shoe-limited wheat and canola compared with previous Deere designs.
That is a manufacturer comparison under specific conditions, not a guaranteed farm result.
Active Concave Isolation is available only on the S7 800 and S7 900.
For farms regularly working tough, high-volume canola, those two machines therefore have a hardware advantage over S7 600 and S7 700 beyond engine horsepower alone.
That does not mean a smaller S7 cannot harvest canola well.
It means the upper pair provides more tools when canola becomes one of the main capacity constraints.
What About Peas and Lentils?
Current Harvest Settings Automation support extends beyond the traditional corn, soybeans and wheat discussion.
John Deere now lists crops including lentils and peas among those supported by Harvest Settings Automation.
That is particularly relevant in Saskatchewan, where pulse acreage makes a combine’s ability to move between crops important.
Grain quality matters here.
More aggressive settings are not always better.
The value of automation is that the operator can define limits around grain loss, foreign material and broken grain, then allow the combine to adjust several settings around those targets.
The exact automation functions depend on the technology package installed on the machine.
For pulse operations, that configuration should be checked as carefully as the engine specification.
Cleaning System: 54.9 vs 63.5 Square Feet
Cleaning capacity is one of the biggest physical differences separating the lower and upper S7 models.
S7 600 and S7 700
Total louvered cleaning area:
54.9 sq. ft.
S7 800 and S7 900
Total louvered cleaning area:
63.5 sq. ft.
That extra area matters because the cleaning shoe can become the combine’s practical limit even when the engine still has available horsepower.
If losses begin climbing from the cleaning system, adding more ground speed does not create useful capacity.
It simply sends more grain out the back.
This is why the S7 700 to S7 800 transition is more substantial than the 80 hp difference suggests.
The upper machine has more power and more room to clean the additional material that power can bring into the machine.
Active Concave Isolation: Only S7 800 and S7 900
This is another clear dividing line.
S7 600: No
S7 700: No
S7 800: Available
S7 900: Available
Active Concave Isolation uses hydraulic pressure to help hold the concave more consistently under heavy crop loads.
When a large volume of tough crop enters the rotor, the force against the concave can affect the threshing relationship.
The system is intended to keep that geometry more stable.
John Deere states that Active Concave Isolation can increase capacity by 10 percent in the difficult conditions where the system is designed to work.
Again, this is a Deere test claim, not a universal increase in every field.
Its value is most obvious for farms that regularly harvest tough small grains outside ideal conditions.
If your normal harvest rarely puts the concave under that kind of load, the feature may matter much less.
Grain Tank Comparison
The S7 family uses two grain-tank sizes.
| Model | Grain Tank |
| S7 600 | 300 bu |
| S7 700 | 300 bu |
| S7 800 | 400 bu |
| S7 900 | 400 bu |
This is another reason to view the lineup as two pairs.
A 100-bushel increase is significant.
But a larger tank is useful only when the farm’s grain-cart strategy makes use of it.
If the cart is always beside the combine before the tank fills, the extra 100 bushels may be less important.
If the cart regularly services multiple combines or has longer travel distances, the extra buffer can become valuable.
The larger tank also adds substantial weight when full.
That needs to be considered when field conditions are wet.
Unloading Rate Comparison
| Model | Peak Unloading Rate |
| S7 600 | 3.6 bu/s |
| S7 700 | 4.2 bu/s |
| S7 800 | 4.2 bu/s |
| S7 900 | 4.2 bu/s |
Only the S7 600 uses the slower 3.6 bu/s system.
S7 700, S7 800 and S7 900 all peak at 4.2 bu/s.
This produces another useful insight.
Moving from S7 800 to S7 900 does not give the farm a faster unloading system.
The grain tank is also the same.
So if unloading is already the bottleneck with an S7 800, the S7 900 does not solve that problem simply by having more horsepower.
Fuel Capacity
The fuel system follows the same lower-versus-upper split.
| Model | Fuel Capacity |
| S7 600 | 250 gal. |
| S7 700 | 250 gal. |
| S7 800 | 330 gal. |
| S7 900 | 330 gal. |
The JD14-powered machines carry another 80 gallons.
Fuel-tank capacity should not be confused with fuel consumption.
Actual fuel use changes with crop, terrain, residue chopping, engine load and harvesting strategy.
The larger tank simply gives the upper models more onboard fuel for the workload they are expected to handle.
Machine Weight and Wet Prairie Harvests
John Deere lists the base machine weights without headers as:
| Model | Base Weight |
| S7 600 | 43,006 lb |
| S7 700 | 43,752 lb |
| S7 800 | 49,141 lb |
| S7 900 | 49,141 lb |
The major weight jump happens at S7 800.
And these numbers are not full field weights.
A real combine also has:
- a header
- fuel
- installed options
- potentially 300 or 400 bushels of grain
That makes the upper S7 machines very heavy when fully loaded.
John Deere offers suspended track systems with 30- or 36-inch belts for the S7 family.
Tracks can improve flotation and distribute the machine’s weight over a larger contact area.
They do not remove the weight.
For Saskatchewan, Alberta and Manitoba farms where a wet harvest is a recurring risk, the choice between tires and tracks deserves to be considered alongside combine size.
A larger machine carrying 400 bushels can create a very different soil-loading situation from a lighter S7 600.
Predictive Ground Speed Automation
A major part of the current S7 story is automation.
Predictive Ground Speed Automation uses forward-facing cameras together with field information to detect changing crop volume before the material reaches the feeder house.
The combine can then adjust ground speed in advance.
That is fundamentally different from reacting only after engine load rises.
If a heavy patch is already inside the machine before the combine slows, the response comes late.
Predictive control attempts to keep crop flow more consistent.
John Deere states that the system can increase productivity by up to 20 percent in its referenced same-model comparison with the automation switched on versus off.
That number should be treated as a Deere claim under its test conditions.
The more useful point is how the system works.
It is designed to keep the machine closer to a consistent load instead of alternating between underloaded and overloaded operation.
Harvest Settings Automation
Harvest Settings Automation tackles a different problem.
Instead of concentrating on ground speed, it manages the settings that determine threshing and cleaning.
The operator enters acceptable limits for things such as:
- grain loss
- foreign material
- broken grain
The combine can then adjust settings including:
- rotor speed
- fan speed
- concave clearance
- chaffer
- sieve clearance
This technology is included with certain Deere technology packages rather than being something that should be assumed on every individual S7.
That distinction matters when comparing configured machines.
An S7 600 with a strong technology package may offer automation that a differently configured larger machine does not.
The model number tells you the mechanical platform.
The installed technology package tells you much more about what the combine can automate.
AutoTrac Turn Automation and Machine Sync
John Deere has continued adding automation around the harvesting process itself.
AutoTrac Turn Automation can manage in-crop turns and now includes automatic header raise and lower functionality in the current S7 technology offering.
Machine Sync addresses grain-cart coordination.
The combine can help control and coordinate tasks associated with unloading, while machines can share guidance and harvest information.
These features do not change rotor size or engine horsepower.
They address another source of lost productivity: operator workload and coordination.
On a large operation, that matters.
A combine is only productive when crop is moving through it.
Time lost to steering, poor cart positioning or inconsistent unloading can reduce the value of additional mechanical capacity.
ActiveYield and Grain Data
ActiveYield automatically calibrates yield measurements as the grain tank fills.
That can reduce the manual calibration work required to maintain yield data.
Current S7 technology also integrates with Deere’s G5Plus CommandCenter, StarFire receiver and JDLink environment.
For farms already using Deere Operations Center, this gives the combine a place inside the same precision-ag system as other field equipment.
Again, this is not a reason by itself to choose S7 900 over S7 700.
Much of the technology is available across the S7 family depending on package.
That makes S7 model selection primarily a mechanical capacity decision, with technology configuration handled as a second layer.
Technology Does Not Replace Combine Capacity
It is easy to look at modern automation and assume software can make a smaller combine perform like a larger one.
That is not how it works.
Predictive Ground Speed can help keep an S7 600 loaded more consistently.
It cannot give the machine a 400-bushel tank.
Harvest Settings Automation can help an S7 700 stay closer to the operator’s targets.
It cannot add the cleaning area or Active Concave Isolation of the S7 800.
Technology helps use the hardware more effectively.
It does not erase the physical differences between the models.
That is why the first decision should still be which mechanical S7 platform fits the operation.
Then decide which automation package makes sense on that platform.
Which S7 Offers the Best Balance?
There is no universal winner, but two models stand out for different reasons.
S7 700: Strongest Lower-Platform Choice
The S7 700 keeps:
- JD9 9.0 L engine architecture
- 300-bushel tank
- lower machine weight
- 54.9-square-foot cleaning system
But it adds 78 maximum horsepower over the S7 600 and increases unloading to 4.2 bu/s.
For a farm that does not need the upper S7 architecture, the S7 700 is a very logical place to stop.
S7 800: Biggest Overall Step
The S7 800 changes much more.
It adds:
- JD14 13.6 L
- 540 maximum hp
- 400-bushel tank
- 63.5-square-foot cleaning area
- Active Concave Isolation availability
- 330-gallon fuel capacity
For a large Prairie grain operation, the S7 800 may represent the most significant balance of hardware and capacity in the lineup.
S7 900: Best When Power Is Specifically the Limit
The S7 900 shares most of the S7 800’s hardware.
Its main reason for existing is another 77 maximum horsepower.
That makes it the right model when the farm has already justified the S7 800 platform and still needs more engine reserve.
Which S7 Would We Choose for Different Operations?
Rather than assigning arbitrary acreage limits, it is better to match the combine to the actual harvest system.
Moderate crop flow, one-combine operation
Start with S7 600.
If its power and 300-bushel tank comfortably fit the normal harvest window, there is little reason to move higher simply for the model number.
Same general machine size, but heavier crop
Look closely at S7 700.
It keeps the lower-platform dimensions and grain capacity while adding considerable engine output and faster unloading.
Large Prairie grain operation
S7 800 becomes especially interesting.
The move to a larger engine, cleaning system and grain tank is useful when high crop flow is normal rather than occasional.
Very heavy workload where S7 800 power is consistently used
S7 900.
The upper model makes the most sense when the operation can actually use another 77 horsepower without immediately running into another bottleneck.
What Is Your Actual Harvest Bottleneck?
Before deciding between any of these models, identify what currently slows harvest.
If engine power is the limit
Moving higher in the S7 range can help.
If the cleaning shoe is the limit
The S7 800/900 cleaning system may matter more than horsepower.
If grain tank capacity is the problem
The 400-bushel upper models provide a clear advantage.
If the combine waits for the grain cart
A larger combine may make the problem worse.
If trucks cannot move grain away
The bottleneck is outside the combine.
If the header cannot keep the combine evenly fed
More engine power will not solve poor feeding.
If field size causes constant turning and moving
Peak machine capacity may matter less than it does on large, open fields.
This is the part of combine selection that specification sheets cannot answer for you.
John Deere S7 vs New Holland CR Series
The S7 range also creates several natural comparisons with New Holland’s established Twin Rotor lineup.
New Holland uses two longitudinal rotors, while Deere’s S7 uses a single 30-inch rotor.
That architecture difference makes the comparison much more interesting than horsepower alone.
A useful rough pairing by engine output is:
| John Deere | Max HP | New Holland | Max HP |
| S7 600 | 382 hp | CR7.80 | 415 hp |
| S7 700 | 460 hp | CR7.90 | 460 hp |
| S7 800 | 540 hp | CR8.90 | Up to 571 hp |
| S7 900 | 617 hp | CR9.90 | 600 hp |
The New Holland CR Series comparison explains the CR7.80 through CR10.90 family in detail.
For individual cross-brand comparisons, the New Holland CR7.90 is especially interesting against the S7 700 because both are listed at 460 maximum horsepower.
The CR8.90 is a natural comparison for the S7 800, while the CR9.90 sits close to the S7 900 in maximum engine output.
Those comparisons should not be decided by horsepower.
Rotor architecture, cleaning, grain handling, automation, residue management, headers and dealer support all matter.
When Should You Look Beyond the S7 to an X9?
The S7 900 is the top S7, but it is not Deere’s highest-capacity combine.
The X9 family sits above it.
The X9 changes the architecture more fundamentally.
Instead of the S7’s single 30-inch rotor, X9 uses a dual-rotor separator. It also moves to larger cleaning and grain-handling systems.
The X9 1000 is currently listed at 630 maximum horsepower with a 420-bushel tank and 4.6 bu/s unloading.
Notice how close 630 hp is to the S7 900’s 617 hp.
Yet the X9 is a very different capacity proposition because of the crop-processing architecture around that engine.
This is another excellent example of why horsepower alone is a poor way to classify modern combines.
A farm should move from S7 into X9 territory when it needs the higher-capacity harvesting platform, not simply because it wants a larger horsepower number.
What About Straw Quality?
The S7 is a rotary combine.
Deere’s Variable-Stream Rotor allows operators to adjust material movement, and Deere notes that changing the vane angle can reduce stress on straw.
That can help when usable straw matters.
But if preserving long cereal straw is one of the farm’s highest priorities, it still makes sense to compare rotary machines with a conventional straw-walker combine.
New Holland’s CX8 Series is one example already covered on Aglist.
This is particularly relevant for mixed grain and livestock operations.
The best combine for maximum grain throughput is not automatically the best machine for a farm where straw has substantial value after harvest.
Browse the broader combine category to compare rotary and conventional machines.
What to Compare on an Individual S7
Two combines with the same S7 model number can still be configured differently.
When comparing individual machines, look beyond horsepower.
Check:
- rotor configuration
- technology package
- Predictive Ground Speed availability
- Harvest Settings Automation
- guidance configuration
- Machine Sync capability
- tracks or tires
- unloading auger length
- residue-management package
- header compatibility
- hours
- separator hours
- service history
- feeder-house wear
- concave and rotor condition
- cleaning-system condition
- unloading-system wear
Technology packages are especially important on the current S7.
Do not assume an advertised S7 automatically has every automation system Deere describes for the series.
Common S7 Comparison Mistakes
Mistake 1: Choosing by horsepower alone
The S7 700 to S7 800 jump changes much more than horsepower.
The S7 800 to S7 900 jump changes much less.
Mistake 2: Assuming every larger model has a larger rotor
All four current S7 models list the same 30-inch by 123-inch rotor dimensions.
Mistake 3: Ignoring cleaning capacity
S7 800 and S7 900 have more cleaning area than S7 600 and S7 700.
Mistake 4: Ignoring grain logistics
A 400-bushel tank does little good if carts and trucks cannot handle the additional crop flow.
Mistake 5: Assuming every S7 has the same automation package
Mechanical model and technology configuration are two separate decisions.
Mistake 6: Assuming S7 900 is automatically the best S7
It is the most powerful S7.
That is not the same thing as being the best fit for every farm.
Our S7 Series Verdict
The current S7 lineup is more logical than it first appears.
The S7 600 is the entry point. It provides the current Deere S7 harvesting system without carrying the capacity of the upper machines.
The S7 700 is the stronger version of that lower platform. Same 9.0 L engine family, same 300-bushel tank, but considerably more power and faster unloading.
The S7 800 is the major step. This is where Deere moves to the 13.6 L JD14, a 400-bushel tank, more cleaning area and Active Concave Isolation.
The S7 900 takes that upper platform and gives it the most engine power available in the S7 family.
For a farm trying to choose between all four, the decision tree is fairly simple:
Need the lower S7 architecture? Compare S7 600 vs S7 700.
Need the upper S7 architecture? Compare S7 800 vs S7 900.
Not sure which half of the lineup you need? The critical comparison is S7 700 vs S7 800.
That middle transition tells you whether the farm really needs a larger combine, or simply more power from the smaller platform.
Frequently Asked Questions
What are the current John Deere S7 combine models?
The current Canadian S7 lineup includes the S7 600, S7 700, S7 800 and S7 900.
Which John Deere S7 has the most horsepower?
The S7 900 is the most powerful model, with 543 rated horsepower and 617 maximum horsepower.
How much horsepower does the S7 600 have?
The S7 600 has 333 rated horsepower and 382 maximum horsepower from its 9.0 L JD9 engine.
How much horsepower does the S7 700 have?
The S7 700 has 402 rated horsepower and 460 maximum horsepower from the 9.0 L JD9.
How much horsepower does the S7 800 have?
The S7 800 has 473 rated horsepower and 540 maximum horsepower from the 13.6 L JD14.
How much horsepower does the S7 900 have?
The S7 900 has 543 rated horsepower and 617 maximum horsepower from the 13.6 L JD14.
What is the main difference between S7 600 and S7 700?
Both use the JD9 9.0 L engine family, a 300-bushel tank and 54.9-square-foot cleaning system. The S7 700 adds substantially more power and increases peak unloading from 3.6 to 4.2 bu/s.
What is the main difference between S7 700 and S7 800?
This is the biggest structural change in the lineup. The S7 800 moves to the 13.6 L JD14 engine, 400-bushel grain tank, larger cleaning system, more fuel capacity and available Active Concave Isolation.
What is the main difference between S7 800 and S7 900?
Most major hardware specifications are the same. The main difference is engine output. The S7 800 reaches 540 maximum hp, while the S7 900 reaches 617 hp.
Do all John Deere S7 combines use the same rotor size?
John Deere currently lists all four models with a 30-inch-diameter, 123-inch-long rotary separator.
Which S7 models have a 400-bushel grain tank?
The S7 800 and S7 900 have 400-bushel grain tanks. S7 600 and S7 700 carry 300 bushels.
Which S7 models have Active Concave Isolation?
John Deere currently lists Active Concave Isolation only for the S7 800 and S7 900.
Which S7 combine is best for wheat and canola?
It depends on crop volume and conditions. S7 600 and S7 700 can suit moderate workloads, while S7 800 and S7 900 add larger cleaning systems and available Active Concave Isolation that can be useful in high-volume or tough small-grain conditions.
Does the John Deere S7 have Harvest Settings Automation?
Harvest Settings Automation is available through specific technology packages. It can automatically adjust several threshing and cleaning settings based on operator-selected targets for grain loss, foreign material and broken grain.
Does the John Deere S7 have Predictive Ground Speed?
Predictive Ground Speed Automation is available through Deere’s technology offering. It uses information ahead of the combine to adjust travel speed before crop volume changes reach the machine.
Is S7 900 better than S7 800?
The S7 900 has more engine power, but most major upper-S7 hardware is the same. If engine power is the limiting factor, the S7 900 can make sense. If an S7 800 is limited by something else, the additional horsepower may provide little practical advantage.
S7 700 or S7 800: which should I choose?
Choose based on whether the farm needs the upper-S7 platform. The S7 800 brings a larger engine, 400-bushel tank, larger cleaning area and Active Concave Isolation. If those changes are not needed, the S7 700 keeps a lighter 300-bushel platform with 460 maximum horsepower.
Is the John Deere S7 a single-rotor combine?
Yes. The current S7 uses a single longitudinal rotary separator. Deere’s higher-capacity X9 family uses a dual-rotor separator.
Compare Individual S7 Models
- John Deere S7 600 – 382 max hp, JD9 9.0 L, 300-bu grain tank.
- John Deere S7 700 – 460 max hp, JD9 9.0 L, 300-bu grain tank and faster 4.2 bu/s unloading.
- John Deere S7 800 – 540 max hp, JD14 13.6 L, 400-bu grain tank and available Active Concave Isolation.
- John Deere S7 900 – 617 max hp and the highest engine output in the S7 family.
- New Holland CR Series Compared – compare the competing CR7.80 through CR10.90 Twin Rotor lineup.
- All Combines – compare combine types, brands and model families.
- John Deere Equipment – browse more John Deere equipment on Aglist.
Specifications in this guide are based on the current John Deere Canada S7 model and series information. Available technology, rotor configuration, tracks, headers and other equipment can vary by configuration and model year. Manufacturer performance claims are identified as such and should not be treated as guaranteed results for every field or crop condition.
