Compare/International Harvester 656 vs International Harvester 686

International Harvester 656 vs International Harvester 686

Verdict: International Harvester 656 vs International Harvester 686

The International Harvester 656 and the International Harvester 686 are both tractors — here is how they stack up on the figures that matter. International Harvester 686 leads on rated power with 66 hp against 64 hp. International Harvester 686 is the lighter machine (3,524 kg vs 5,800 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 686 is the newer design (1976 vs 1965). In short: choose the International Harvester 686 for outright pulling power, or the International Harvester 656 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

64 hp

66 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

International HarvesterReference

With 16.9-30 rear tires.Reference

With 15.5-38 rear tires.Reference

Total built

—

6,000Reference

Variants

2656

industrial tractorReference

—

IH 656

utility tractorReference

—

Farmall 656

row-crop tractorReference

—

656HC

high-clearReference

—

Engine

Fuel tank

87.1 LReference

—

Plows

4-5Reference

—

Displacement

4.6 LReference

4.8 LReference

Bore/Stroke

90 x 112 mmReference

95 x 112 mmReference

Air cleaner

dryReference

Rated RPM

2300 (late)Reference

2000Reference

Idle RPM

900-1800Reference

900-2000Reference

Oil capacity

8.5 LReference

60.6 LReference

Coolant capacity

19.9 LReference

Firing order

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

—

Compression

8.8:1Reference

—

Drawbar (tested)

—

43.3 kWReference

Starter volts

—

12Reference

Power at rated engine speed

—

49.5 kWReference

Max power

—

43.0 kWReference

Transmission

Gears

infinite forward and reverse (2-range)Reference

10 forward and 2 reverseReference

Clutch

279.4mm cerametallic discReference

—

Transmission

Torque AmplifierReference

PTO & Hydraulics

PTO (claimed)

47.6 kWReference

—

Type

hydrostaticReference

two-speed power shiftReference

Valves

0 to 2Reference

—

Pump flow

45.4 lpmReference

—

Rear Type

IIReference

Control

lower-link draft sensingReference

—

Rear PTO

independentReference

Rear PTO Type

540/1000Reference

540 (1.375)Reference

PTO (tested)

—

49.5 kWReference

Hydraulic system

—

60.6 LReference

Capacity

—

60.6 LReference

Total flow

—

45.4 lpmReference

Dimensions

Wheelbase

203 cmReference

261 cmReference

Weight

5800 to 6100 poundsReference

3524 kgReference

Front tire

7.50-16Reference

Rear tire

16.9-38Reference

15.5-38Reference

Ag front

6.00-16 (Hi-Clear)Reference

7.50-16Reference

Ag rear

15.5-38 (Hi-Clear)Reference

15.5-38Reference

Length

386 cmReference

411 cmReference

Width

187 cmReference

227 cmReference

Height (steering wheel)

157 cmReference

—

Height (hood)

142 cmReference

—

Gas Shipping weight

2630 kgReference

—

Diesel Shipping weight

2766 kgReference

3524 kgReference

Clearance (front axle)

48 cmReference

—

Bar rear axle

69 mmReference

—

Front tread

137 to 213 cmReference

147 to 208 cmReference

Rear tread

137 to 198 cmReference

142 to 243 cmReference

Height (exhaust)

—

266 cmReference

Ballasted weight

—

4690 kgReference

International Harvester 656 attachments

656 Serial Numbers

1966

7501 (IH)Reference

—

1967

7842 (IH)Reference

—

1968

9929 (IH)Reference

—

1969

11802 (IH)Reference

—

1970

13353 (IH)Reference

—

1971

14194 (IH)Reference

—

1972

14952 (IH)Reference

—

1973

15746 (IH)Reference

—

Location:

Clutch housing, right sideReference

Clutch housing on right side.Reference

Electrical

Charging system

alternatorReference

—

Charging amps

55Reference

—

Attachment overview

Speeds

Capacities

Fuel

—

117.3 LReference

686 Serial Numbers

1976

—

7500Reference

1977

—

7729Reference

1978

—

9899Reference

1979

—

11417Reference

1980

—

12923Reference

Test results

Fuel use

—

15.5 l/hourReference

Max pull

—

3634 kgReference

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.