7 material differences · fewer than 12
Tractor oneInternational Harvester B-4501958–1969No measured PTO figureTractor twoSOMECA SOM-551961–1963No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their power is identical, with the same weight or the same engine, which usually means one machine sold under two names; any difference below comes from how each source describes it. 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
7 material differences · 7 fields identical or within 5%, which is not counted as material
| Field | B-450 | SOM-55 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 54.3 hp | 54.3 hp | — |
| Engine declared | INTERNATIONAL HARVESTER BD-264 | O.M.-FIAT CO 1D/55 | differs |
| Displacement declared | 4.33 L | 4.16 L | — |
| Maximum torque declared | 201 lb·ft · 272 N·m | — | — |
| Transmission | |||
| Top speed declared | 16.2 mph · 26 km/h | 14.9 mph · 24 km/h | +8% B-450 |
| Clutch declared | Pedal-operated dry single-plate clutch | pedal operated two stage dry FERODO double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 3.6 gpm · 13.6 L/min | 5.7 gpm · 21.5 L/min | +58% SOM-55 |
| Pressure declared | — | 2,988 psi · 206 bar | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 5,842 lb · 2,650 kg | 5,776 lb · 2,620 kg | — |
| Wheelbase declared | 79.5 in · 2,019 mm | 80.0 in · 2,032 mm | — |
| Length declared | 131.1 in · 3,330 mm | 140.9 in · 3,580 mm | +8% SOM-55 |
| Width declared | 51.6–55.9 in · 1,310–1,420 mm | 68.7–95.1 in · 1,745–2,415 mm | differs |
| Height, over the steering wheel declared | 71.0 in · 1,803 mm | 72.5 in · 1,841 mm | — |
| Ground clearance declared | 14.8 in · 375 mm | 15.4 in · 390 mm | — |
| Turning radius, braked declared | — | 10.8 ft · 3.30 m | — |
| Fuel tank declared | 83.5 qt · 79.0 L | 93.0 qt · 88.0 L | +11% SOM-55 |
International Harvester B-450 sources
Source
- Source: Traktorenlexikon, “IHC B-450”
- Source: Traktorenlexikon, “McCormick BMD”
- Source: Traktorenlexikon, “McCormick B-450”
SOMECA SOM-55 sources
Source
- Source: Traktorenlexikon, “Someca SOM 55”