8 material differences · fewer than 12

Tractor oneInternational Harvester D-4391962–1966No measured PTO figureTractor twoOLIVER 1250 (4 WD)1965–1969No measured PTO figure

Which should you choose?

Read our verdict on the D-439 and the 1250 (4 WD) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

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

International Harvester D-439 and OLIVER 1250 (4 WD), field by field
Field	D-439	1250 (4 WD)	Gap
Engine
Engine power, claimed claimed	38.5 hp	38.0 hp	—
Engine declared	INTERNATIONAL-HARVESTER DD-148	FIAT 615	differs
Displacement declared	2.43 L	—	—
Maximum torque declared	98 lb·ft · 133 N·m	—	—
Transmission
Top speed declared	12.4 mph · 20 km/h	15.5 mph · 25 km/h	+25% 1250 (4 WD)
Clutch declared	Pedal operated dry single plate clutch from Fichtel & Sachs	Pedal-operated dry double clutch	differs
Hydraulics & hitch
Pump flow declared	6.3 gpm · 24.0 L/min	—	—
Pressure declared	2,119 psi · 146 bar	—	—
Rear PTO speeds declared	540 rpm	540 rpm	—
Weight & dimensions
Unladen weight declared	3,876 lb · 1,758 kg	3,285 lb · 1,490 kg	+18% D-439
Wheelbase declared	74.0 in · 1,880 mm	75.5 in · 1,918 mm	—
Length declared	115.4 in · 2,930 mm	118.0 in · 2,997 mm	—
Width declared	64.6 in · 1,640 mm	50.5 in · 1,283 mm	+28% D-439
Height, over the steering wheel declared	61.0 in · 1,550 mm	51.2 in · 1,300 mm	+19% D-439
Ground clearance declared	15.0 in · 380 mm	15.4 in · 390 mm	—
Turning radius, braked declared	8.9 ft · 2.70 m	9.8 ft · 3.00 m	+11% 1250 (4 WD)
Fuel tank declared	58.1 qt · 55.0 L	52.8 qt · 50.0 L	+10% D-439

Source

Source