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John Deere 4840 vs John Deere 8440

Verdict: John Deere 4840 vs John Deere 8440

The John Deere 4840 and the John Deere 8440 are both tractors — here is how they stack up on the figures that matter. John Deere 4840 leads on rated power with 181 hp against 180 hp. John Deere 8440 is the lighter machine (12,061 kg vs 14,900 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 8440 is the newer design (1979 vs 1978). In short: choose the John Deere 4840 for outright pulling power, or the John Deere 8440 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 4840 Tractor
John Deere
94
Fit score
Best match
Clear
John Deere 8440 Tractor
John Deere
94
Fit score
Best match
Clear
Rated power
181 hp
180 hp
Confidence
98%
98%
Guide price
Overview
Manufacturer
John DeereReference
John DeereReference
Clutchless shift-on-the-move power shift between all eight forward and four reverse gears. Inching pedal provided for hooking up implements and other precision work.Reference
With 18.4-38 tires.Reference
Differential lock
pedal-actuated hydraulicReference
hydraulic front and rearReference
Engine
Drawbar (claimed)
117.1 kWReference
Drawbar (tested)
112.8 kWReference
119.7 kWReference
Displacement
7.6 LReference
7.6 LReference
Bore/Stroke
116 x 121 mmReference
116 x 121 mmReference
Air cleaner
dual paper elementsReference
Pre-heating
ether injectionReference
Compression
15.5:1Reference
15.5:1Reference
Rated RPM
2200Reference
2100Reference
Idle RPM
800-2400Reference
800-2300Reference
Operating RPM
1500-2200Reference
1500-2100Reference
Firing order
1-5-3-6-2-4Reference
1-5-3-6-2-4Reference
Starter volts
12Reference
12Reference
Coolant capacity
37.9 LReference
37.9 LReference
Power at rated engine speed
134.7 kWReference
134.1 kWReference
Max power
112.8 kWReference
119.7 kWReference
Fuel Type
DieselReference
No of Cylinders
6-cylinderReference
Rated engine speed
2,200 | 1,500-2,200 RPMReference
Bore and stroke
4.5,625x4.75 inchesReference
Compression ratio
15.5:1Reference
Cooling system
liquid-cooled | 40 qtsReference
Engine
160.3 kWReference
Power
160.3 kWReference
Transmission
Transmission
John Deere PowerShiftReference
John Deere Quad-RangeReference
Gears
8 forward and 4 reverseReference
16 forward and 6 reverseReference
Oil capacity
75.7 LReference
151.4 LReference
forward and reverse options
8 forward and 4 reverseReference
Clutch
hydraulic wet discReference
PTO & Hydraulics
PTO (claimed)
134.2 kWReference
130.5 kWReference
PTO (tested)
134.7 kWReference
134.1 kWReference
Hydraulic system
62.5 LReference
151.4 LReference
Type
full power shiftReference
partial power shiftReference
Capacity
62.5 LReference
151.4 LReference
Valves
2 or 3Reference
2Reference
Pump flow
87.1 lpmReference
124.9 lpmReference
Rear Type
III/IIINReference
IIIReference
Rear lift
3762 kgReference
3876 kgReference
Rear PTO
independentReference
independentReference
Rear PTO Type
1000 (1.75)Reference
1000Reference
Power at rated PTO speed
135.4 kWReference
Capacities
Fuel
389.9 LReference
590.5 LReference
Dimensions
Wheelbase
300 cmReference
317 cmReference
Weight
14900 to 18000 poundsReference
12061 kgReference
Front tire
11.00-16Reference
18.4-34Reference
Rear tire
18.4-38Reference
18.4-34Reference
Ag front
9.50-20Reference
18.4-34Reference
Ag rear
18.4-42Reference
18.4-34Reference
Length
449 cmReference
567 cmReference
Width
299 cmReference
Height (cab)
297 cmReference
Clearance (front axle)
66 cmReference
Clearance (rear axle)
71 cmReference
Clearance (drawbar)
37 cmReference
Rack-and-pinion rear axle
99 by 2997 mmReference
99 by 3007 mmReference
Front tread
147 to 254 cmReference
160 to 330 cmReference
Rear tread
152 to 334 cmReference
160 to 330 cmReference
Shipping
6758 kgReference
Operating
8164 kgReference
Ballasted
9239 kgReference
Operating weight
12061 kgReference
Ground clearance
49 cmReference
Front axle
99 by 3007 mmReference
4840 Serial Number Location
4840 Serial Numbers
1978
1000Reference
1979
4233Reference
1000Reference
1980
7539Reference
2266Reference
1981
11042Reference
3758Reference
1982
14933Reference
5235Reference
Electrical
Ground
negativeReference
negativeReference
Charging system
alternatorReference
alternatorReference
Batteries
2Reference
2Reference
Battery volts
6Reference
6Reference
Battery options
2 | 2Reference
Charging amps
90Reference
Battery CCA
850Reference
Test results
Fuel use
42.8 l/hourReference
42.4 l/hourReference
Max pull
7850 kgReference
11513 kgReference
General
Make & Model
John DeereReference
PTO
Rear PTO Power
AvailableReference
Rear PTO RPM
1,000 (1.75)Reference
Hydraulics
Hydraulics Type
closed centerReference
Remote Valves
2 or 3Reference
Rear Hitch category (SAE designation)
Category III/IIINReference
Dimensions & weight
Height Over Cab
297.2 cmReference
Overall Height
297.2 cmReference
Overall Length
449.6 cmReference
Overall Width
243.8 cmReference
Drawbar clearance
37.8 cmReference
Front axle clearance
66 cmReference
Wheels & tyres
Rear wheel tread range
18.4-38, 24.5-32, 30.5-32, 20.8-38, 18.4-42 inchReference
Front Wheel tread range
11.00-16, 10.00-16, 14L-16.1, 16.5L-16.1, 9.50-20Reference
8440 Serial Number Location
8440 Serial Numbers
John Deere 8440 Height
Hood
221 cmReference
Cab
321 cmReference
Exhaust
341 cmReference
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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