10 material differences · fewer than 12

Tractor oneJ.I. Case 4311960–1969No measured PTO figureTractor twoNuffield PM-41951–1957No measured PTO figure

Which should you choose?

Read our verdict on the 431 and the PM-4 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

Field by field

10 material differences · 1 fields identical or within 5%, which is not counted as material

J.I. Case 431 and Nuffield PM-4, field by field
Field	431	PM-4	Gap
Engine
Engine power, claimed claimed	35.0 hp	48.0 hp	+37% PM-4
Engine declared	CASE G-188 D	MORRIS-COMMERCIAL 38 T/V	differs
Displacement declared	3.09 L	3.77 L	+22% PM-4
Maximum torque declared	—	148 lb·ft · 200 N·m	—
Transmission
Top speed declared	12.4–21.7 mph · 20–35 km/h	17.4 mph · 28 km/h	differs
Clutch declared	—	Pedal-operated dry single-plate clutch	—
Hydraulics & hitch
Pump flow declared	8.5 gpm · 32.2 L/min	7.2 gpm · 27.3 L/min	+18% 431
Rear PTO speeds declared	540 rpm	540 rpm	—
Weight & dimensions
Unladen weight declared	3,838 lb · 1,741 kg	4,546 lb · 2,062 kg	+18% PM-4
Wheelbase declared	85.0 in · 2,159 mm	78.0 in · 1,981 mm	+9% 431
Length declared	130.1 in · 3,305 mm	121.5 in · 3,086 mm	+7% 431
Width declared	79.6 in · 2,022 mm	69.0 in · 1,753 mm	+15% 431
Ground clearance declared	20.1 in · 510 mm	17.0 in · 432 mm	+18% 431
Turning radius, braked declared	7.9 ft · 2.41 m	—	—
Fuel tank declared	40.8 qt · 38.6 L	67.2 qt · 63.6 L	+65% PM-4

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.

J.I. Case 431 sources

Source

Source: Traktorenlexikon, “Case 431”

Nuffield PM-4 sources