Compare/John Deere 8770 vs John Deere 9420T

John Deere 8770 vs John Deere 9420T

Verdict: John Deere 8770 vs John Deere 9420T

The John Deere 8770 and the John Deere 9420T are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 300 hp. John Deere 9420T is the lighter machine (17,690 kg vs 31,438 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 9420T is the newer design (2002 vs 1993). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer 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

300 hp

Confidence

98%

Guide price

—

Overview

Manufacturer

John DeereReference

Six gears (1-6) in four ranges (A-D). Power shift between gear pairs 1/2, 3/4, and 5/6. Synchronized shifting between other gears and ranges.Reference

Four synchronized ranges (A-D) with three synchronized gears (1-3) and a high-low power shift.Reference

Original price

$114,945Reference

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Final drives

inboard planetaryReference

—

Steering

hydrostatic powerReference

electro-hydraulic powerReference

Drive

—

crawlerReference

Engine

Engine (gross)

223.7 kWReference

—

Drawbar (tested)

180.8 kWReference

241.2 kWReference

Displacement

10.1 LReference

12.5 LReference

Bore/Stroke

130 x 127 mmReference

127 x 165 mmReference

Power (gross)

223.7 kWReference

—

Air cleaner

dual paper elements with aspiratorReference

—

Compression

15.75:1Reference

17:1Reference

Rated RPM

2100Reference

Starter volts

12Reference

Oil capacity

32.0 LReference

246.1 LReference

Coolant capacity

54.9 LReference

60.6 LReference

Power at rated engine speed

193.4 kWReference

223.5 kWReference

Max power

180.8 kWReference

241.2 kWReference

Engine

—

316.9 kWReference

Power

—

316.9 kWReference

Transmission

Power ShiftReference

John Deere PowrSyncReference

Gears

12 forward and 2 reverseReference

24 forward and 6 reverseReference

PTO & Hydraulics

PTO (claimed)

190.9 kWReference

225.2 kWReference

PTO (tested)

193.4 kWReference

258.4 kWReference

Hydraulic system

143.8 LReference

104.1 LReference

Type

full power shiftReference

partial power shiftReference

Capacity

143.8 LReference

104.1 LReference

Pressure

174.4 barReference

200.0 barReference

Rear valves

3 to 5Reference

—

Pump flow

169.6 lpmReference

113.6 lpmReference

SCV flow

126.0 lpmReference

—

Rear Type

3 (optional)Reference

III, IV/IVNReference

Control

draft sensingReference

—

Rear lift

6794 kgReference

6552 kgReference

Rear PTO

independentReference

Clutch

hydraulic wet discReference

—

Rear PTO Type

1000 (1.75)Reference

1000Reference

Power at rated PTO speed

213.5 kWReference

247.5 kWReference

Valves

—

4 or 5Reference

Total flow

—

181.7 lpmReference

Capacities

Fuel

832.7 LReference

1211.2 LReference

Dimensions

Wheelbase

340 cmReference

281 cmReference

Weight

14950 kgReference

17690 kgReference

Front tire

24.5R-32Reference

—

Rear tire

24.5R-32Reference

—

Ag front

18.4R-46Reference

—

Ag rear

18.4R-46Reference

—

Length

683 cmReference

Shipping weight

14260 kgReference

—

Front axle

99 by 3048 mmReference

—

Rear axle

99 by 3048 mmReference

—

Height (cab)

—

345 cmReference

Height (exhaust)

—

351 cmReference

Max weight

—

22680 kgReference

Ground clearance

—

48 cmReference

8770 Serial Number Location

8770 Serial Numbers

1993

1001Reference

—

1994

1771Reference

—

1995

2795Reference

—

1996

4001Reference

—

Electrical

Ground

negativeReference

Batteries

2Reference

3Reference

Battery CCA

925Reference

Battery volts

12Reference

Charging system

—

alternatorReference

Charging amps

—

140Reference

Test results

Fuel use

59.8 l/hourReference

76.1 l/hourReference

Max pull

15179 kgReference

19242 kgReference

Variants

9420

—

wheeled tractorReference

9420T Serial Number Location

John Deere 9420T Tracks

Width

—

345 cmReference

Length on ground

—

281 cmReference

Area on ground

—

5.2 m²Reference

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.