SPECS / COMPARISON

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Manufacturer-sourced values side by side. No performance equivalence or ranking is applied across different machine classes.

Feature	Farmall 856Tractor	International Harvester 686Tractor
Tractor Type	Row-Crop Tractor	Utility Tractor
Horsepower	70.8 kW	—
Weight	4670.0 kg	4690.0 kg
Transmission Type	Two-speed power shift with dry disc clutch	Two-speed power shift
Length	416.0 cm	411.0 cm
Years Made	1967-1971	1976-1980
Engine Model	International Harvester C-301	International Harvester C291
Engine Type	4-stroke, liquid-cooled, inline	4-stroke, liquid-cooled, inline
Fuel Type	Gasoline/LP-gas	Gasoline
Cylinders	6	6
Displacement	4932 cc	4769 cc
Bore	9.70 cm	9.50 cm
Stroke	11.20 cm	11.20 cm
Rear PTO Type	Independent	Independent
Rear PTO Speed	1000, 540/1000 RPM	540 RPM
Rated RPM	2400 RPM	—
Compression Ratio	Gasoline: 7.7:1LP-gas: 8.8:1	—
Starter	Electric	Electric
Height	218.0 cm	266.0 cm
Wheelbase	266.0 cm	261.0 cm
Fuel Tank Capacity	181.7 l	117.3 l
Oil Capacity	8.5 l	11.4 l
Coolant Capacity	20.3 l	19.9 l
Transmission Oil Capacity	64.4 l	60.6 l
Transmission Model	Torque Amplifier	Torque Amplifier
Gears	16 forward and 8 reverse	10 forward and 2 reverse
Chassis	4×2 2WD or 4×4 MFWD 4WD	4×2 2WD
Max. Travel Speed	14.9 km/h	4.7 km/h
Brakes	Independent hydraulic disc	Disc
Drawbar Category	II	II
Cabin Type	Cab with heat and A/C	Two-post fixed ROPS
Hitch Type	IH Fast Hitch	—
Steering Type	Hydrostatic power	Power
Front Tires	Ag: 7.50-16	Ag: 7.50-16
Rear Tires	Ag: 16.9-38	Ag: 15.5-38
Hydraulic Capacity	—	60.6 l
Hydraulic Type	—	Open center
Total Flow	—	45.4 LPM
Source	heavyequipments.net archive (imported 2026-10)	heavyequipments.net archive (imported 2026-10)

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Side-by-side specification comparisons generated from the manufacturer-sourced model files. · 7,051