10 material differences · fewer than 12
Tractor oneInternational Harvester D-4361959–1962No measured PTO figureTractor twoOLIVER 1255 (4 WD)1969–1971No measured PTO figure
Which should you choose?
We will not advise between these two machines, because the drive differs (2WD; Two-wheel or four-wheel drive); they were not built in overlapping years (1959–1962; 1969–1971). 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 · 5 fields identical or within 5%, which is not counted as material
| Field | D-436 | 1255 (4 WD) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 35.5 hp | 41.4 hp | +17% 1255 (4 WD) |
| Engine declared | INTERNATIONAL-HARVESTER DD-148 | FIAT 853-A | differs |
| Displacement declared | 2.43 L | 2.34 L | — |
| Maximum torque declared | 98 lb·ft · 133 N·m | 105 lb·ft · 143 N·m | +8% 1255 (4 WD) |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 15.5 mph · 25 km/h | +25% 1255 (4 WD) |
| Clutch declared | pedal operated dry single plate clutch | Pedal-operated dry LuK single-disc clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 6.3 gpm · 24.0 L/min | 5.8 gpm · 21.8 L/min | +10% D-436 |
| Pressure declared | 2,119 psi · 146 bar | — | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 3,854 lb · 1,748 kg | 4,123 lb · 1,870 kg | +7% 1255 (4 WD) |
| Wheelbase declared | 74.0 in · 1,880 mm | 75.7 in · 1,922 mm | — |
| Length declared | 126.6 in · 3,215 mm | 115.0 in · 2,921 mm | +10% D-436 |
| Width declared | 64.6 in · 1,640 mm | 62.9–87.3 in · 1,598–2,218 mm | differs |
| Height, over the steering wheel declared | 61.0 in · 1,550 mm | 58.6 in · 1,488 mm | — |
| Ground clearance declared | 15.0 in · 380 mm | 18.2 in · 462 mm | +22% 1255 (4 WD) |
| Turning radius, braked declared | 9.2 ft · 2.80 m | 9.4 ft · 2.86 m | — |
| Fuel tank declared | 31.7–58.1 qt · 30.0–55.0 L | 57.1 qt · 54.0 L | differs |
International Harvester D-436 sources
Source
- Source: Traktorenlexikon, “McCormick D-436 Standard”
OLIVER 1255 (4 WD) sources
Source
- Source: Traktorenlexikon, “Oliver 1255”
- Source: Traktorenlexikon, “Oliver 1250-A”