10 material differences · fewer than 12
Tractor oneJohn Deere R1949–1954No measured PTO figureTractor twoSOMECA SOM-501961–1963No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their unladen weight differs by more than 25% (46%); they were not built in overlapping years (1949–1954; 1961–1963). The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.
Field by field
10 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | R | SOM-50 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 48.7 hp | 49.3 hp | — |
| Engine declared | John Deere R-1358 | O.M.-FIAT CO 1D/50 | differs |
| Displacement declared | 6.81 L | 4.16 L | +64% R |
| Maximum torque declared | — | 177 lb·ft · 240 N·m | — |
| Transmission | |||
| Top speed declared | 11.2 mph · 18 km/h | 14.3 mph · 23 km/h | +28% SOM-50 |
| Clutch declared | Hand lever operated dry JOHN DEERE double plate clutch | Pedal operated two stage dry FERODO double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | — | 5.3 gpm · 20.0 L/min | — |
| Rear PTO speeds declared | 536 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 7,401 lb · 3,357 kg | 5,071 lb · 2,300 kg | +46% R |
| Wheelbase declared | 85.1 in · 2,162 mm | 74.8 in · 1,900 mm | +14% R |
| Length declared | 147.0 in · 3,734 mm | 125.2 in · 3,180 mm | +17% R |
| Width declared | 79.5 in · 2,019 mm | 60.4–91.9 in · 1,535–2,335 mm | differs |
| Ground clearance declared | — | 23.1 in · 587 mm | — |
| Turning radius, braked declared | — | 10.8 ft · 3.30 m | — |
| Fuel tank declared | 88.0 qt · 83.3 L | 53.9 qt · 51.0 L | +63% R |
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.
John Deere R sources
- Source: Traktorenlexikon, “John Deere Modell R”
SOMECA SOM-50 sources
- Source: Traktorenlexikon, “Someca SOM 50”