Compare/John Deere 4520 vs John Deere 6125D

John Deere 4520 vs John Deere 6125D

Verdict: John Deere 4520 vs John Deere 6125D

The John Deere 4520 and the John Deere 6125D are both tractors — here is how they stack up on the figures that matter. John Deere 6125D leads on rated power with 123 hp against 122 hp. John Deere 6125D is the lighter machine (3,870 kg vs 12,285 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 6125D is the newer design (2008 vs 1969). In short: choose the John Deere 6125D for outright pulling power, or the John Deere 4520 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

John Deere

Fit score

Best match

Clear

John Deere

Fit score

Best match

Clear

Rated power

122 hp

123 hp

Confidence

98%

Guide price

—

Overview

Manufacturer

John DeereReference

Clutchless shifting on the move between all gears. Inching pedal for precise movements.Reference

Three gears (1-3) plus reverse (R) in each of three ranges (A-C). Shifts between gears, including to reverse, are synchronized using the clutch. Shifts between ranges are not synchronized, the operator must stop the tractor and use the clutch.Reference

Total built

6,228 (Synchro range)Reference

—

Drive

4x4 HFWD 4WDReference

—

Differential lock

hydraulic rearReference

—

Steering

—

hydrostatic powerReference

Engine

Drawbar (claimed)

79.8 kWReference

—

Drawbar (tested)

82.9 kWReference

—

Displacement

6.6 LReference

4.5 LReference

Bore/Stroke

108 x 121 mmReference

106 x 127 mmReference

Air cleaner

dryReference

dry element with pre-cleanerReference

Pre-heating

coolant heaterReference

—

Compression

16.4:1Reference

17:1Reference

Rated RPM

2200Reference

2100Reference

Idle RPM

800-2200Reference

950-2275Reference

Operating RPM

1500-2200Reference

—

Firing order

1-5-3-6-2-4Reference

1-3-4-2Reference

Starter volts

12Reference

Coolant capacity

26.5 LReference

16.5 LReference

Intake valve clearance

0.457 mmReference

0.356 mmReference

Exhaust valve clearance

0.559 mmReference

0.457 mmReference

Oil capacity

60.6 LReference

57.9 LReference

Oil change

100 hReference

500 h (JD TorqGARD oil)Reference

Power at rated engine speed

92.0 kWReference

—

Max power

82.9 kWReference

—

Fuel Type

dieselReference

—

No of Cylinders

4 cylinderReference

—

Rated engine speed

2,400 RPMReference

—

Engine torque at rated speed

61.2 kgReference

—

Bore and stroke

3.386x4.134 inchesReference

—

Compression ratio

20.5:1Reference

—

Cooling system

liquid-cooledReference

—

Engine (gross)

—

91.7 kWReference

Rated Power (gross)

—

91.7 kWReference

Starter

—

electricReference

Transmission

John Deere Power ShiftReference

John Deere Top Shaft Syncronized (TSS)Reference

Gears

8 forward and 4 reverseReference

9 forward and 3 reverseReference

Oil type

John Deere 303Reference

—

Transmission Type

E-HSTReference

—

Wheel Drive

4WDReference

—

PTO & Hydraulics

PTO (claimed)

89.5 kWReference

78.3 kWReference

PTO (tested)

92.0 kWReference

—

Hydraulic system

68.1 LReference

57.9 LReference

Type

full power shiftReference

partially synchronziedReference

Capacity

68.1 LReference

57.9 LReference

Pressure

155.1 barReference

195.1 barReference

Valves

1 to 3Reference

—

Rear Type

III/IIReference

IIReference

Rear PTO

independentReference

Clutch

wet discReference

dry discReference

Rear PTO Type

1000Reference

540/1000 (1.375)Reference

Power at rated PTO speed

85.9 kWReference

—

Rear valves

—

2 to 3Reference

Pump flow

—

66.6 lpmReference

Steering flow

—

26.1 lpmReference

Control

—

mechanical lower linkReference

Rear lift (at ends)

—

3469 kgReference

Rear lift (at 24"/610mm)

—

3150 kgReference

Engine RPM

—

1000@2100Reference

Capacities

Fuel

189.2 LReference

157.8 LReference

Fuel tank

54.9 LReference

—

Crankcase oil volume

7.9 qtsReference

—

Front axle

—

6.5 LReference

Front hubs

—

2.0 LReference

Dimensions

Wheelbase

270 cmReference

234 cmReference

Weight

12285 to 14175 poundsReference

3870 kgReference

Front tire

10.00-16Reference

14.9-24Reference

Rear tire

20.8-38Reference

23.1-30Reference

Ag front

14L-16Reference

—

Ag rear

24.5-32Reference

—

Length

433 cmReference

421 cmReference

Width

243 cmReference

182 cmReference

Height

269 cmReference

—

Height (steering wheel)

220 cmReference

—

Clearance (front axle)

60 cmReference

—

Clearance (rear axle)

78 cmReference

—

Clearance (drawbar)

45 cmReference

—

Rear axle

2997 mmReference

1828 mmReference

Front tread

146 to 211 cmReference

—

Rear tread

160 to 273 cmReference

—

Shipping

5572 kgReference

—

Operating

6429 kgReference

—

Ballasted

8162 kgReference

—

Standard tires (ag)

—

Front: 14.9-24. Rear: 23.1-30Reference

Height (cab)

—

273 cmReference

Height (exhaust)

—

269 cmReference

Shipping weight

—

3870 kgReference

Max weight

—

6899 kgReference

John Deere 4520 attachments

4520 Serial Numbers

1969

1000Reference

—

1970

7055Reference

—

Location:

Serial number plate on the rear of the 4520.Reference

Right side of main tractor frame above front axle.Reference

Final

8977Reference

—

Electrical

Ground

negativeReference

Charging system

alternatorReference

Charging amps

72 (with A/C)Reference

90 (cab)Reference

Batteries

2Reference

—

Battery volts

6Reference

12Reference

Battery AH

172Reference

102Reference

Total cold cranking amps

770 CCAReference

—

Battery CCA

—

550Reference

Battery Group

—

27Reference

Test results

Fuel use

31.0 l/hourReference

—

Max pull

5997 kgReference

—

Speeds

General

Make & Model

John DeereReference

—

Cruise control

StandardReference

—

Country of manufacturer

USAReference

—

PTO

PTO Power

52 hpReference

—

Rear PTO Power

AvailableReference

—

Rear PTO RPM

540 RPMReference

—

Mid PTO

AvailableReference

—

Mid PTO RPM

2,100 RPMReference

—

Steering & brakes

Brakes

Wet disc brakesReference

—

Steering type

Power steeringReference

—

Hydraulics

Pump Rated Output (total)

17.1 gpmReference

—

Hydraulics Type

open centerReference

—

Maximum operating pressure

2,500 psiReference

—

Remote Valves

0 to 5 ValvesReference

—

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

—

Height Over Cab

234.7 cmReference

—

Overall Length

325.6 cmReference

—

Overall Width

233.4 cmReference

—

Overall weight

1,748.6 kgReference

—

Operator station

Cab Availability

AvailableReference

—

Seat Suspension

TRUEReference

—

John Deere 6125D attachments

6125D Serial Numbers

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.