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John Deere 7920 vs John Deere 8120

Verdict: John Deere 7920 vs John Deere 8120

The John Deere 7920 and the John Deere 8120 are both tractors — here is how they stack up on the figures that matter. John Deere 8120 leads on rated power with 208 hp against 205 hp. John Deere 7920 is the lighter machine (17,603 kg vs 19,100 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 7920 is the newer design (2004 vs 2002). In short: choose the John Deere 8120 for outright pulling power, or the John Deere 7920 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Fit & specs
John Deere 7920 Tractor
John Deere
94
Fit score
Best match
Clear
John Deere 8120 Tractor
John Deere
94
Fit score
Best match
Clear
Rated power
205 hp
208 hp
Confidence
98%
98%
Guide price
Overview
Manufacturer
John DeereReference
John DeereReference
Hydro-mechanical IVT controlled via right-hand speed lever and left-hand reverser lever. Knob on the speed lever adjusts the set speeds for two ranges. Minimum speed of 50 meters per hour (164 feet per hour).Reference
With 18.4R46 rear tires.Reference
Steering
hydrostatic powerReference
Engine
Engine (gross)
153.0 kWReference
155.1 kWReference
Engine (net)
147.0 kWReference
149.1 kWReference
Engine (max)
164.0 kWReference
171.5 kWReference
Drawbar (tested)
108.9 kWReference
110.7 kWReference
Displacement
8.1 LReference
8.1 LReference
Bore/Stroke
116 x 129 mmReference
116 x 129 mmReference
Rated Power (net)
147.0 kWReference
149.1 kWReference
Rated Power (gross)
153.0 kWReference
155.1 kWReference
Maximum Power (net)
158.0 kWReference
164.1 kWReference
Maximum Power (gross)
164.0 kWReference
171.5 kWReference
Air cleaner
dual paper elementsReference
dry with secondary elementReference
Compression
16.5:1Reference
16.5:1Reference
Rated RPM
2100Reference
2200Reference
Idle RPM
875-2200Reference
900-2300Reference
Starter volts
12Reference
12Reference
Oil capacity
24.0 LReference
149.9 LReference
Coolant capacity
32.0 LReference
34.0 LReference
Max power
108.9 kWReference
110.7 kWReference
Power at rated engine speed
127.7 kWReference
128.4 kWReference
Fuel system
electronic high-pressure common rail (HPCR)Reference
Operating RPM
1500-2200Reference
Oil change
250 hReference
Transmission
Transmission
AutoPowr IVTReference
John Deere PowerShiftReference
Gears
infinite forward and reverseReference
16 forward and 4 reverseReference
PTO & Hydraulics
PTO (claimed)
126.8 kWReference
126.8 kWReference
PTO (tested)
143.7 kWReference
148.9 kWReference
Hydraulic system
107.9 LReference
149.9 LReference
Type
infinitely variable transmissionReference
full power shiftReference
Capacity
107.9 LReference
149.9 LReference
Pressure
210.0 barReference
200.0 barReference
Valves
7Reference
5Reference
Pump flow
121.9 lpmReference
SCV flow
113.6 lpmReference
113.6 lpmReference
Rear Type
3/3NReference
III,IIINReference
Rear lift
6350 kgReference
6885 kgReference
Rear PTO
independentReference
independentReference
Clutch
hydraulic wet discsReference
hydraulic wet discReference
Rear PTO Type
1000 (1.75)Reference
540/1000 (1.375 optional)Reference
Engine RPM
1000@1950Reference
1000@2200Reference
Front PTO
independentReference
Front PTO Type
1000 (1.75)Reference
Power at rated PTO speed
138.4 kWReference
Total flow
160.9 lpmReference
Front Hitch
IIINReference
Front lift
4989 kgReference
Capacities
Fuel
358.4 LReference
605.6 LReference
Front axle
14.4 LReference
MFWD ILSReference
Front hubs
1.9 LReference
4.0 LReference
HD Front hubs
3.8 LReference
Front diff.
13.4 LReference
Dimensions
Wheelbase
286 cmReference
Weight
17603 to 17965 poundsReference
19100 to 22450 poundsReference
Front tire
420/90R30Reference
11.00-24Reference
Rear tire
480/80R46Reference
480/80R46Reference
Ag front
420/90R30Reference
Ag rear
480/80R46Reference
Length
610 cmReference
538 cmReference
Width
299 cmReference
Height (cab)
318 cmReference
305 cmReference
Clearance (front axle)
56 cmReference
Clearance (rear axle)
41 cmReference
Rear axle
99 by 2997 mmReference
Shipping
7984 kgReference
10183 kgReference
Operating
8148 kgReference
9099 kgReference
Ballasted
10607 kgReference
2WD Wheelbase
313 cmReference
4WD Wheelbase
296 cmReference
ILS Wheelbase
302 cmReference
Standard tires (ag)
Front: 11.00-24. Rear: 480/80R46Reference
Rack-and-pinion rear axle
119 by 3009 mmReference
2WD Front tread
152 to 223 cmReference
4WD Front tread
152 to 203 cmReference
ILS Front tread
152 to 223 cmReference
Max Drawbar
4536 kgReference
John Deere 7920 attachments
7920 Serial Number Location
Electrical
Ground
negativeReference
negativeReference
Charging system
alternatorReference
alternatorReference
Charging amps
150Reference
150Reference
Batteries
2Reference
2Reference
Battery CCA
925Reference
925Reference
Battery volts
12Reference
12Reference
Test results
Fuel use
37.5 l/hourReference
38.6 l/hourReference
Max pull
10526 kgReference
10118 kgReference
Variants
8120
wheeled tractorReference
8120T
crawlerReference
8120 Serial Number Location
8120 Serial Numbers
2002
1001Reference
2003
10001Reference
2004
20001Reference
2005
30001Reference
Speeds

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.

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