10 material differences · fewer than 12
Tractor oneFord 901 Powermaster1958–1962No measured PTO figureTractor twoJ.I. Case 7701969–1973No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their unladen weight differs by more than 25% (171%); they were not built in overlapping years (1958–1962; 1969–1973). 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 | 901 Powermaster | 770 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 55.5 hp | 56.2 hp | — |
| Engine declared | — | CASE A 267 | — |
| Transmission | |||
| Top speed declared | 17.4 mph · 28 km/h | 15.5–18.6 mph · 25–30 km/h | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 4.0 gpm · 15.1 L/min | 16.0 gpm · 60.6 L/min | +301% 770 |
| Rear PTO speeds declared | 540 rpm | 540/1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 3,344 lb · 1,517 kg | 9,050 lb · 4,105 kg | +171% 770 |
| Wheelbase declared | 85.3 in · 2,167 mm | 101.0 in · 2,565 mm | +18% 770 |
| Length declared | 132.0 in · 3,353 mm | 153.0 in · 3,886 mm | +16% 770 |
| Width declared | 71.7 in · 1,821 mm | 88.0 in · 2,235 mm | +23% 770 |
| Ground clearance declared | 28.4 in · 722 mm | 15.0 in · 381 mm | +90% 901 Powermaster |
| Turning radius, braked declared | 7.5 ft · 2.29 m | 11.4 ft · 3.48 m | +52% 770 |
| Fuel tank declared | 81.7 qt · 77.3 L | 200.0 qt · 189.3 L | +145% 770 |
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.
Ford 901 Powermaster sources
- Source: Traktorenlexikon, “Ford 901”
J.I. Case 770 sources
- Source: Traktorenlexikon, “Case 770”