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John Deere 4120 vs John Deere AH

Verdict: John Deere 4120 vs John Deere AH

The John Deere 4120 and the John Deere AH are both tractors — here is how they stack up on the figures that matter. John Deere 4120 leads on rated power with 35 hp against 34 hp. John Deere 4120 is the lighter machine (1,678 kg vs 2,903 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 4120 is the newer design (2004 vs 1947). In short: choose the John Deere 4120 for outright pulling power, or the John Deere AH 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 4120 Tractor
John Deere
71
Fit score
Best match
Clear
John Deere AH Tractor
John Deere
71
Fit score
Best match
Clear
Rated power
35 hp
34 hp
Confidence
98%
98%
Guide price
Overview
Manufacturer
John DeereReference
John DeereReference
With 16.3-28 rear tires.Reference
With 11-38 rear tires.Reference
Steering
hydrostatic powerReference
Total built
181 (all-fuel)Reference
Engine
Engine
32.1 kWReference
Displacement
2.4 LReference
5.3 LReference
Bore/Stroke
86 x 105 mmReference
140 x 171 mmReference
Power
32.1 kWReference
Compression
20:1Reference
Rated RPM
2400Reference
975Reference
Starter volts
12Reference
12Reference
Starter power
2.2 kWReference
Oil capacity
36.3 LReference
Coolant capacity
6.1 LReference
Fuel Type
dieselReference
No of Cylinders
4 cylinderReference
Rated engine speed
2,400 RPMReference
Bore and stroke
3.386x4.134 inchesReference
Compression ratio
20:1Reference
Cooling system
liquid-cooledReference
Drawbar (claimed)
25.4 kWReference
Belt (claimed)
28.3 kWReference
Starter
electricReference
Transmission
Transmission
eHydroReference
John DeereReference
Gears
infinite forward and reverseReference
6 forward and 1 reverseReference
Transmission Type
E-HSTReference
forward and reverse options
PowrReverser - 12 F and 12 R | hydrostatic - Infinite F and RReference
Wheel Drive
4WDReference
PTO & Hydraulics
PTO (claimed)
26.1 kWReference
Hydraulic system
36.3 LReference
Type
hydrostaticReference
gearReference
Capacity
36.3 LReference
Pressure
172.4 barReference
Pump flow
45.4 lpmReference
Total flow
64.7 lpmReference
Steering flow
19.3 lpmReference
Rear Type
IReference
Rear lift (at ends)
1419 kgReference
Rear lift (at 24"/610mm)
1134 kgReference
Rear PTO
independentReference
Rear PTO Type
540Reference
Mid PTO
independent (optional)Reference
Mid PTO Type
2100Reference
Capacities
Fuel
54.9 LReference
Fuel tank
54.9 LReference
Crankcase oil volume
7.9 qtsReference
Dimensions
Wheelbase
181 cmReference
Weight
662 kgReference
2903 kgReference
Front tire
8.00-16Reference
7.50-20Reference
Rear tire
13.6-28Reference
11-38Reference
Ag front
8.00-16Reference
7.50-20Reference
Ag rear
13.6-28Reference
12-38Reference
Length
325 cmReference
Width
166 cmReference
Height (hood)
157 cmReference
Height (ROPS)
246 cmReference
Max Drawbar
500 kgReference
Shipping weight
2903 kgReference
Front tread
152 to 213 cmReference
Rear tread
152 to 228 cmReference
John Deere 4120 attachments
Electrical
Ground
negativeReference
positiveReference
Charging system
alternatorReference
Charging amps
75Reference
Battery CCA
770Reference
Battery volts
12Reference
6Reference
Total cold cranking amps
770 ccaReference
Batteries
2Reference
Attachment overview
72" Mower deck
Cutting width
182 cmReference
Overall width
215 cmReference
Cut height
2 to 24 cmReference
John Deere 485 Backhoe
Backhoe type
John Deere 485 BackhoeReference
Transport height
228 cmReference
Digging depth
266 cmReference
Reach from pivot
360 cmReference
Loading height
223 cmReference
Bucket Rotation
180°Reference
Swing Arc
180°Reference
Bucket force
1691 kgReference
Dipperstick force
1104 kgReference
Speeds
General
Make & Model
John DeereReference
Cruise control
StandardReference
Country of manufacturer
USAReference
Power
Max Power
43.1 hpReference
PTO
PTO Power
35 hpReference
Rear PTO Power
AvailableReference
Rear PTO RPM
540 RPMReference
Mid PTO RPM
2,100 RPMReference
Hydraulics
Pump Rated Output (total)
17.1 gpmReference
Hydraulics Type
Open CenterReference
Maximum operating pressure
2,500 psiReference
Steering & Implements flow
5.1 gpm (12 gpm)Reference
Rear Hitch category (SAE designation)
Category IReference
Rear Hitch maximum lift capacity
1,419.7 kgReference
Dimensions & weight
Height Over ROPS
246.9 cmReference
Overall Length
325.6 cmReference
Overall weight
1,678.3 kgReference
Wheels & tyres
Rear Wheel Type
13.6-28Reference
Front Wheel Type
8.00-16Reference
Operator station
Seat Suspension
TRUEReference
Steering & brakes
Steering type
Hydrostatic PowerReference
Variants
AR
A-Regular with standard front axleReference
AO
OrchardReference
AW
Adjustable wide-frontReference
AN
Single front wheelReference
AH
High-cropReference

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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