11 material differences · fewer than 12

Tractor oneInternational Harvester 6561965–1972No measured PTO figureTractor twoSOMECA 670 (DT)1968–1971No measured PTO figure

Which should you choose?

Read our verdict on the 656 and the 670 (DT) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

11 material differences · 2 fields identical or within 5%, which is not counted as material

International Harvester 656 and SOMECA 670 (DT), field by field
Field	656	670 (DT)	Gap
Engine
Engine power, claimed claimed	64.1 hp	64.1 hp	—
Engine declared	INTERNATIONAL HARVESTER C-263	O.M.-FIAT CO 3/60	differs
Displacement declared	—	4.56 L	—
Maximum torque declared	—	207 lb·ft · 281 N·m	—
Transmission
Top speed declared	15.5–21.1 mph · 25–34 km/h	14.9 mph · 24 km/h	differs
Clutch declared	Pedal operated dry single plate clutch	Pedal-operated two-stage dry FEREDO double clutch type 11/10"	differs
Hydraulics & hitch
Pump flow declared	12.0 gpm · 45.5 L/min	6.1 gpm · 23.2 L/min	+96% 656
Pressure declared	—	2,843 psi · 196 bar	—
Rear PTO speeds declared	540/1000 rpm	540 rpm	differs
Weight & dimensions
Unladen weight declared	5,798 lb · 2,630 kg	6,041 lb · 2,740 kg	—
Wheelbase declared	80.0 in · 2,032 mm	91.2 in · 2,316 mm	+14% 670 (DT)
Length declared	152.0 in · 3,861 mm	142.3 in · 3,615 mm	+7% 656
Width declared	87.0 in · 2,210 mm	77.6–96.1 in · 1,970–2,440 mm	differs
Height, over the steering wheel declared	77.0 in · 1,956 mm	69.9 in · 1,775 mm	+10% 656
Ground clearance declared	19.0 in · 483 mm	13.4 in · 340 mm	+42% 656
Turning radius, braked declared	—	12.9 ft · 3.93 m	—
Fuel tank declared	132.1 qt · 125.0 L	84.5 qt · 80.0 L	+56% 656

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