11 material differences · fewer than 12
Tractor oneInternational Harvester Farmall M/MV1939–1952No measured PTO figureTractor twoNuffield PM-41951–1957No measured PTO figure
Which should you choose?
Read our verdict on the Farmall M/MV 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
11 material differences · 0 fields identical or within 5%, which is not counted as material
| Field | Farmall M/MV | PM-4 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 36.5 hp | 48.0 hp | +32% PM-4 |
| Engine declared | INTERNATIONAL HARVESTER C-248 | MORRIS-COMMERCIAL 38 T/V | differs |
| Displacement declared | 4.06 L | 3.77 L | +8% Farmall M/MV |
| Maximum torque declared | — | 148 lb·ft · 200 N·m | — |
| Transmission | |||
| Top speed declared | 16.2 mph · 26 km/h | 17.4 mph · 28 km/h | +8% PM-4 |
| Clutch declared | Pedal-operated dry Rockford single-plate clutch type 11 inches | Pedal-operated dry single-plate clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | — | 7.2 gpm · 27.3 L/min | — |
| Rear PTO speeds declared | 537 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 4,910 lb · 2,227 kg | 4,546 lb · 2,062 kg | +8% Farmall M/MV |
| Wheelbase declared | 88.7 in · 2,254 mm | 78.0 in · 1,981 mm | +14% Farmall M/MV |
| Length declared | 133.1 in · 3,381 mm | 121.5 in · 3,086 mm | +10% Farmall M/MV |
| Width declared | 84.5–100.0 in · 2,146–2,540 mm | 69.0 in · 1,753 mm | differs |
| Ground clearance declared | 25.5 in · 648 mm | 17.0 in · 432 mm | +50% Farmall M/MV |
| Turning radius, braked declared | 6.8 ft · 2.08 m | — | — |
| Fuel tank declared | 84.0 qt · 79.5 L | 67.2 qt · 63.6 L | +25% Farmall M/MV |
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 Farmall M/MV sources
- Source: Traktorenlexikon, “IHC Farmall-M”
- Source: Traktorenlexikon, “McCormick Farmall-M”
- Source: Traktorenlexikon, “Farmall Farmall-M”
Nuffield PM-4 sources
- Source: Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)”