Compare/John Deere 8RX 370 vs John Deere 9R 390

John Deere 8RX 370 vs John Deere 9R 390

Verdict: John Deere 8RX 370 vs John Deere 9R 390

The John Deere 8RX 370 and the John Deere 9R 390 are both tractors — here is how they stack up on the figures that matter. John Deere 9R 390 leads on rated power with 385 hp against 370 hp. John Deere 8RX 370 is the lighter machine (19,504 kg vs 20,856 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 9R 390 holds more fuel (1514.0 L vs 927.3 L) for longer stints between fills. John Deere 9R 390 is the newer design (2021 vs 2019). In short: choose the John Deere 9R 390 for outright pulling power, or the John Deere 8RX 370 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

John Deere

Fit score

Best match

Clear

John Deere

Fit score

Best match

Clear

Rated power

370 hp

385 hp

Confidence

98%

Guide price

—

Overview

Manufacturer

John DeereReference

Gear 6 used for pull test.Reference

With group 48 tires.Reference

Drive

crawlerReference

—

Differential lock

electro-hydraulic front and rearReference

Final drives

—

inboard planetaryReference

Variants

8R 370

wheeledReference

—

8RT 370

two-trackReference

—

8RX 370

four-trackReference

—

Engine

Fuel tank

927.3 LReference

1514.0 LReference

Exhaust fluid (DEF)

37.1 LReference

120.0 LReference

Engine (gross)

275.9 kWReference

287.0 kWReference

Engine (max)

303.5 kWReference

316.0 kWReference

Drawbar (tested)

211.9 kWReference

—

Displacement

9.0 LReference

13.6 LReference

Bore/Stroke

118 x 136 mmReference

132 x 165 mmReference

Emissions

Tier IVReference

Rated Power (gross)

275.9 kWReference

287.0 kWReference

Maximum Power (gross)

303.5 kWReference

316.0 kWReference

Fuel system

electronic high-pressure common railReference

Compression

16.0:1Reference

15.9:1Reference

Starter

electricReference

Starter volts

12Reference

Max power

211.9 kWReference

—

Power at rated engine speed

254.6 kWReference

—

Fuel Type

DieselReference

Emissions compliance

Final Tier 4Reference

Final Tier 4 (FT4)Reference

Engine torque at rated speed

Option 1: 2,100 rpm\\nOption 2: 1,732 NmReference

Option 1: 2,100 rpm\\nOption 2: 1,800 NmReference

Interval for engine oil change

500 hoursReference

Interval for engine coolant change

6,000 hoursReference

Cooling system

42.3 LReference

56.5 LReference

Air cleaner

—

dryReference

Rated RPM

—

2100Reference

Torque

—

1800.8 NmReference

Torque RPM

—

1550Reference

Oil capacity

—

64.0 LReference

Oil change

—

500 hReference

Coolant capacity

—

56.5 LReference

No of Cylinders

—

6Reference

Transmission

e23Reference

e18Reference

Gears

infinite forward and reverseReference

18 forward and 6 reverseReference

Transmission Type

PowershiftReference

Wheel Drive

MFWDReference

4WDReference

Rear Axle Drive Type

Inboard planetaryReference

Inboard planetary with double-reduction axleReference

Interval for hydraulic/transmission oil change

1,500 hoursReference

PTO & Hydraulics

PTO (claimed)

231.2 kWReference

249.8 kWReference

PTO (tested)

287.2 kWReference

—

Type

infinitely variable transmissionReference

full power shiftReference

Pressure

204.0 barReference

200.0 barReference

Rear valves

4 to 6Reference

—

Pump flow

317.9 lpmReference

416.4 lpmReference

SCV flow

159.0 lpmReference

Rear Type

IVN/IIIReference

IVN/IVReference

Control

electro-hydraulic draft sensingReference

—

Rear lift (at 24"/610mm)

6894 kgReference

9072 kgReference

Rear PTO

independentReference

Rear PTO Type

1000 (1.75)Reference

Engine RPM

1000@2000Reference

—

Power at rated PTO speed

274.4 kWReference

—

Valves

—

4 to 8Reference

Dimensions

Wheelbase

323 cmReference

391 cmReference

Weight

19504 kgReference

20856 kgReference

Gauge

304 cmReference

—

Front tire

—

710/70R42Reference

Rear tire

—

710/70R42Reference

Ag front

—

710/70R42Reference

Ag rear

—

710/70R42Reference

Length

—

794 cmReference

Height (cab)

—

374 cmReference

Height (exhaust)

—

373 cmReference

Shipping weight

—

20856 kgReference

Max weight

—

28123 kgReference

Front axle

—

119 by 3048 mmReference

Rear axle

—

119 by 3048 mmReference

8RX 370 Serial Number Location

Electrical

Ground

negativeReference

Charging system

alternatorReference

Charging amps

330Reference

Batteries

2Reference

3Reference

Battery CCA

925Reference

—

Battery volts

12Reference

Battery Group

31Reference

—

Alternator size

200 ampReference

250 ampReference

Battery options

12 VReference

Total cold cranking amps

1,850 CCAReference

3 x 925 CCA\\nTotal: 2,775 CCAReference

John Deere 8RX 370 Tracks

Width

76 cmReference

440 cmReference

Test results

Fuel use

70.4 l/hourReference

—

Max pull

16179 kgReference

—

General

Make & Model

MJDXL09.0,333Reference

MJDXL13.5,334Reference

SCV control

ElectronicReference

Drawbar category

Category 4/Category 4 with heavy-duty supportReference

Category 4 or Category 5Reference

Drawbar Maximum vertical load

2,245.3 kgReference

5,443.1 kgReference

Rear Axle Type

FlangeReference

Diameter: 120 x 3,048 mm\\n4.72 x 120 in.Reference

Rear Axle Differential Lock

Full-locking electrohydraulicReference

Front Axle Type

1,700 Series MFWDReference

Diameter: 120 x 3,048 mm\\n4.72 x 120 in.Reference

Display

Standard: 4,600 Generation 4 CommandCenter™: 25.4 cm\\n10 in.Reference

—

Country of manufacturer

USAReference

Working lights

Standard: 18 halogen\\nAvailable: 18 LED\\n22 LEDReference

—

Type of headlight bulb

Standard: halogen, 65 W\\nAvailable: LEDReference

Standard: halogen, 65 W\\nOptional: LEDReference

Front Axle Differential Lock

—

Full-locking electrohydraulicReference

Capacities

Capacity

549 cu. in.Reference

827 cu. in.Reference

Diesel exhaust fluid (DEF) tank

37.2 LReference

120 LReference

Crankcase oil volume

7 U.S. galReference

16.9 U.S. galReference

Power

Rated Power

370 hpReference

390 hpReference

Power boost

10 percentReference

Max Power

—

429 hpReference

PTO

PTO Power

310 hpReference

335 hpReference

PTO torque rise

40 percentReference

38 percentReference

Rear PTO Power

AvailableReference

Rear PTO Control

Electrohydraulic with adjustable modulationReference

ElectrohydraulicReference

Rear PTO RPM

540/1,000 rpmReference

1,000 rpmReference

Hydraulics

Pump Rated Output (total)

318 l/minReference

416 l/minReference

Remote Valves

6Reference

4Reference

Number of rear selective control valves (SCVs)

6Reference

—

Rear Hitch category (SAE designation)

4N/3Reference

4NReference

Rear Hitch Sensing Type

ElectrohydraulicReference

Electrohydraulic with draft sensingReference

Rear Hitch maximum lift capacity

—

15,000Reference

Dimensions & weight

Turning radius

6.8 mReference

6.1 mReference

Overall weight

19,640.5 kgReference

20,856.2 kgReference

Tracks Mid Rollers

Front: Two\\nRear: ThreeReference

—

Drawbar clearance

—

527 mmReference

Operator station

Cab Availability

AvailableReference

Cab glass area

70.18 sq ftReference

71.47 sq ftReference

Cab space

114 cu ftReference

115 cu ftReference

Cab Seat Type

—

ActiveSeat™ IIReference

Steering & brakes

Steering type

Standard: Hydraulic power-steering with electric pump backupReference

—

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.