13 material differences
Tractor oneIMT 5551964–1971No measured PTO figureTractor twoSOMECA SOM-501961–1963No measured PTO figure
Which should you choose?
Read our verdict on the 555 and the SOM-50 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
13 material differences · 3 fields identical or within 5%, which is not counted as material
| Field | 555 | SOM-50 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 49.3 hp | 49.3 hp | — |
| Engine declared | IMR-PERKINS O-34/TA | O.M.-FIAT CO 1D/50 | differs |
| Displacement declared | 3.34 L | 4.16 L | +25% SOM-50 |
| Maximum torque declared | 141 lb·ft · 191 N·m | 177 lb·ft · 240 N·m | +26% SOM-50 |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 14.3 mph · 23 km/h | +9% 555 |
| Clutch declared | Pedal operated dry two-stage double clutch | Pedal operated two stage dry FERODO double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 4.0 gpm · 15.1 L/min | 5.3 gpm · 20.0 L/min | +32% SOM-50 |
| Three-point lift, at the coupling points declared | 2,601 lb · 1,180 kg | 2,094 lb · 950 kg | +24% 555 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,123 lb · 1,870 kg | 5,071 lb · 2,300 kg | +23% SOM-50 |
| Wheelbase declared | 84.8 in · 2,155 mm | 74.8 in · 1,900 mm | +13% 555 |
| Length declared | 137.2 in · 3,485 mm | 125.2 in · 3,180 mm | +10% 555 |
| Width declared | 66.9 in · 1,700 mm | 60.4–91.9 in · 1,535–2,335 mm | differs |
| Ground clearance declared | 23.9 in · 607 mm | 23.1 in · 587 mm | — |
| Turning radius, braked declared | 12.3 ft · 3.75 m | 10.8 ft · 3.30 m | +14% 555 |
| Fuel tank declared | 47.6 qt · 45.0 L | 53.9 qt · 51.0 L | +13% SOM-50 |
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.
IMT 555 sources
Source
- Source: Traktorenlexikon, “IMT 555”
SOMECA SOM-50 sources
Source
- Source: Traktorenlexikon, “Someca SOM 50”