8 material differences · fewer than 12

Tractor oneInternational Harvester WD-91940–1954No measured PTO figureTractor twoJ.I. Case 4011955–1957No measured PTO figure

Which should you choose?

Read our verdict on the WD-9 and the 401 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

Field by field

8 material differences · 0 fields identical or within 5%, which is not counted as material

International Harvester WD-9 and J.I. Case 401, field by field
Field	WD-9	401	Gap
Engine
Engine power, claimed claimed	46.4 hp	49.3 hp	+6% 401
Engine declared	INTERNATIONAL HARVESTER D-335	—	—
Displacement declared	5.48 L	—	—
Transmission
Top speed declared	16.2 mph · 26 km/h	12.4 mph · 20 km/h	+30% WD-9
Clutch declared	Pedal operated dry ROCKFORD single plate clutch	Pedal-operated single-plate clutch	differs
Hydraulics & hitch
Pump flow declared	—	12.0 gpm · 45.4 L/min	—
Rear PTO speeds declared	538 rpm	540 rpm	differs
Weight & dimensions
Unladen weight declared	5,851 lb · 2,654 kg	6,583 lb · 2,986 kg	+13% 401
Wheelbase declared	83.0 in · 2,108 mm	91.5 in · 2,324 mm	+10% 401
Length declared	134.3 in · 3,410 mm	142.6 in · 3,622 mm	+6% 401
Width declared	75.7 in · 1,924 mm	85.2 in · 2,164 mm	+12% 401
Ground clearance declared	—	24.2 in · 615 mm	—
Fuel tank declared	140.0 qt · 132.5 L	84.0 qt · 79.5 L	+67% WD-9

Height is not in this table. It is not one measurement: the sources measure it to different points — over the cab on some machines, over the steering wheel or the exhaust on others — and the same tractor measured two ways can differ by most of a metre. It appears here only when both machines' figures carry the point they were measured to and it is the same point, which is not the case for these two. Each machine's own page prints its height as its source gives it.

International Harvester WD-9 sources

Source

Source: Traktorenlexikon, “McCormick WD-9”

J.I. Case 401 sources