9 material differences · fewer than 12
Tractor oneInternational Harvester D-4361959–1962No measured PTO figureTractor twoOLIVER 1250-A (4 WD)1969No 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; 1969–1969). 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
9 material differences · 5 fields identical or within 5%, which is not counted as material
| Field | D-436 | 1250-A (4 WD) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 35.5 hp | 41.4 hp | +17% 1250-A (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% 1250-A (4 WD) |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 15.5 mph · 25 km/h | +25% 1250-A (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% 1250-A (4 WD) |
| Wheelbase declared | 74.0 in · 1,880 mm | 77.0 in · 1,955 mm | — |
| Length declared | 126.6 in · 3,215 mm | 126.6 in · 3,215 mm | — |
| Width declared | 64.6 in · 1,640 mm | 62.4–87.2 in · 1,585–2,215 mm | differs |
| Ground clearance declared | 15.0 in · 380 mm | 18.3 in · 465 mm | +22% 1250-A (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 |
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.
International Harvester D-436 sources
- Source: Traktorenlexikon, “McCormick D-436 Standard”
OLIVER 1250-A (4 WD) sources
- Source: Traktorenlexikon, “Oliver 1250-A”