Compare/International Harvester 645 vs International Harvester 784

International Harvester 645 vs International Harvester 784

Verdict: International Harvester 645 vs International Harvester 784

The International Harvester 645 and the International Harvester 784 are both tractors — here is how they stack up on the figures that matter. International Harvester 784 leads on rated power with 67 hp against 66 hp. International Harvester 645 is the lighter machine (3,701 kg vs 5,850 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 645 is the newer design (1980 vs 1977). In short: choose the International Harvester 784 for outright pulling power, or the International Harvester 645 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

International Harvester

Fit score

Best match

Clear

International Harvester

Fit score

Best match

Clear

Rated power

66 hp

67 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

liquid-cooledReference

The Torque Amplifier (TA) provides a power shift (clutchless, on the move) from direct drive (DD) to a lower TA speed.Reference

Engine

49.2 kWReference

—

Displacement

3.4 LReference

4.0 LReference

Bore/Stroke

98 x 111 mmReference

100 x 129 mmReference

Power

49.2 kWReference

—

Rated RPM

2180Reference

2400Reference

Drawbar (claimed)

—

43.7 kWReference

Drawbar (tested)

—

42.4 kWReference

Air cleaner

—

dryReference

Compression

—

15.5:1Reference

Starter volts

—

12Reference

Oil capacity

—

34.1 LReference

Coolant capacity

—

13.6 LReference

Power at rated engine speed

—

50.3 kWReference

Max power

—

42.4 kWReference

PTO & Hydraulics

Rear Type

IIReference

PTO (claimed)

—

50.3 kWReference

PTO (tested)

—

50.3 kWReference

Hydraulic system

—

34.1 LReference

Type

—

two-speed power shiftReference

Capacity

—

34.1 LReference

Valves

—

1 or 2Reference

Pump flow

—

58.3 lpmReference

Control

—

position and draft controlReference

Rear lift

—

1632 kgReference

Rear PTO

—

independentReference

Clutch

—

dry discReference

Rear PTO Type

—

540/1000 (1.375)Reference

Power at rated PTO speed

—

45.7 kWReference

Dimensions

Weight

3701 kgReference

5850 to 7108 poundsReference

Length

352 cmReference

—

Width

192 cmReference

—

Height

225 cmReference

—

Utility Wheelbase

—

223 cmReference

Row-crop Wheelbase

—

214 cmReference

4WD Wheelbase

—

216 cmReference

Low-profile Wheelbase

—

212 cmReference

Front tire

—

7.50-16Reference

Rear tire

—

16.9-30Reference

Ag front

—

9.00-10 (low-profile)Reference

Ag rear

—

18.4-16.1 (low-profile)Reference

Utility Length

—

360 cmReference

Row-crop Length

—

353 cmReference

4WD Length

—

376 cmReference

Low-profile Length

—

360 cmReference

Utility Width

—

187 cmReference

Row-crop Width

—

190 cmReference

4WD Width

—

187 cmReference

Low-profile Width

—

199 cmReference

Utility Ground clearance

—

45 cmReference

Row-crop Ground clearance

—

50 cmReference

4WD Ground clearance

—

47 cmReference

Low-profile Ground clearance

—

27 cmReference

Bar rear axle

—

69 mmReference

Utility Shipping

—

2698 kgReference

Row-crop Shipping

—

2812 kgReference

4WD Shipping

—

3224 kgReference

Low-profile Shipping

—

2653 kgReference

Ballasted

—

4499 kgReference

Utility Steering wheel

—

160 cmReference

Row-crop Steering wheel

—

165 cmReference

4WD Steering wheel

—

160 cmReference

Low-profile Steering wheel

—

143 cmReference

Transmission

Gears

—

16 forward and 8 reverseReference

Transmission

—

Torque AmplifierReference

Capacities

Fuel

—

75.7 LReference

784 Serial Numbers

1978

—

501Reference

1979

—

1442Reference

1980

—

2752Reference

1981

—

5906Reference

1982

—

8001Reference

1983

—

8219Reference

Location:

—

Serial number plate on the right side of the frame, above the front axle.Reference

Electrical

Ground

—

negativeReference

Battery volts

—

12Reference

Test results

Fuel use

—

14.8 l/hourReference

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.