10 material differences · fewer than 12
Tractor oneDavid Brown 9001957–1958No measured PTO figureTractor twoSOMECA SOM-431 V/E1964–1965No measured PTO figure
Which should you choose?
Read our verdict on the 900 and the SOM-431 V/E → 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 · 4 fields identical or within 5%, which is not counted as material
| Field | 900 | SOM-431 V/E | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 40.1 hp | 40.5 hp | — |
| Engine declared | DAVID BROWN AK-4/30 J or AG-4/30 J | O.M.-FIAT 615.000 | differs |
| Displacement declared | 2.71 L | 2.27 L | +19% 900 |
| Maximum torque declared | — | 101 lb·ft · 137 N·m | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 10.6 mph · 17 km/h | +47% 900 |
| Clutch declared | Pedal-operated dry BORG & BECK single-plate clutch | Pedal-operated two-stage dry double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 10.7 gpm · 40.5 L/min | 4.4 gpm · 16.5 L/min | +145% 900 |
| Pressure declared | 1,493 psi · 103 bar | 2,843 psi · 196 bar | +90% SOM-431 V/E |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 3,999 lb · 1,814 kg | 3,197 lb · 1,450 kg | +25% 900 |
| Wheelbase declared | 75.2 in · 1,911 mm | 71.7 in · 1,820 mm | — |
| Length declared | 116.3 in · 2,953 mm | 112.2 in · 2,850 mm | — |
| Width declared | 48.5–65.0 in · 1,231–1,651 mm | 38.6 in · 980 mm | differs |
| Ground clearance declared | 16.0 in · 406 mm | 13.8 in · 350 mm | +16% 900 |
| Turning radius, braked declared | 9.6 ft · 2.91 m | — | — |
| Fuel tank declared | 55.2 qt · 52.2 L | 51.8 qt · 49.0 L | +7% 900 |
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.
David Brown 900 sources
- Source: Traktorenlexikon, “David Brown 900”
SOMECA SOM-431 V/E sources
- Source: Traktorenlexikon, “Someca SOM 431”
- Source: Traktorenlexikon, “Someca SOM 35”