10 material differences · fewer than 12
Tractor oneMAN AS 2501938–1946No measured PTO figureTractor twoNuffield DM-41950–1954No measured PTO figure
Which should you choose?
Read our verdict on the AS 250 and the DM-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 · 0 fields identical or within 5%, which is not counted as material
| Field | AS 250 | DM-4 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 49.1 hp | 44.9 hp | +9% AS 250 |
| Engine declared | MAN D 0534 GS | PERKINS P-4 | differs |
| Displacement declared | 4.50 L | 3.15 L | +43% AS 250 |
| Maximum torque declared | 174 lb·ft · 235 N·m | 130 lb·ft · 176 N·m | +34% AS 250 |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 17.4 mph · 28 km/h | +40% DM-4 |
| Clutch declared | Fichtel & Sachs single-plate dry clutch Komet-Mecano | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | — | 7.2 gpm · 27.3 L/min | — |
| Rear PTO speeds declared | 545 | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 7,496–8,951 lb · 3,400–4,060 kg | 4,996 lb · 2,266 kg | differs |
| Wheelbase declared | 82.7 in · 2,100 mm | 78.0 in · 1,981 mm | +6% AS 250 |
| Length declared | 144.9–154.7 in · 3,680–3,930 mm | 121.5 in · 3,086 mm | differs |
| Width declared | 72.8–88.6 in · 1,850–2,250 mm | 69.0 in · 1,753 mm | differs |
| Ground clearance declared | 10.2 in · 260 mm | 17.0 in · 432 mm | +66% DM-4 |
| Turning radius, braked declared | 13.1 ft · 4.00 m | — | — |
| Fuel tank declared | — | 67.2 qt · 63.6 L | — |
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.
MAN AS 250 sources
- Source: Traktorenlexikon, “MAN AS 250”
Nuffield DM-4 sources
- Source: Traktorenlexikon, “Nuffield Universal DM 4 / Diesel (1950-1954)”