6 material differences · fewer than 12
Tractor oneFord 6401954–1957No measured PTO figureTractor twoJ.I. Case Modell-D1939–1953No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their unladen weight differs by more than 25% (132%); they were not built in overlapping years (1954–1957; 1939–1953). 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
6 material differences · 3 fields identical or within 5%, which is not counted as material
| Field | 640 | Modell-D | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 31.9 hp | 31.6 hp | — |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 11.0 mph · 17.7 km/h | +13% 640 |
| Clutch declared | — | Hand lever operated double disc clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 2.7–6.0 gpm · 10.2–22.7 L/min | — | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 3,018 lb · 1,369 kg | 7,004 lb · 3,177 kg | +132% Modell-D |
| Wheelbase declared | 74.5 in · 1,892 mm | 66.4 in · 1,686 mm | +12% 640 |
| Length declared | 120.8 in · 3,069 mm | 116.0 in · 2,946 mm | — |
| Width declared | 63.9–87.5 in · 1,623–2,223 mm | 61.5 in · 1,562 mm | differs |
| Ground clearance declared | 21.0 in · 533 mm | 14.0 in · 356 mm | +50% 640 |
| Turning radius, braked declared | 18.0 ft · 5.49 m | — | — |
| Fuel tank declared | 52.8 qt · 50.0 L | 67.9 qt · 64.3 L | +29% Modell-D |
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 640 sources
- Source: Traktorenlexikon, “Ford 600”
J.I. Case Modell-D sources
- Source: Traktorenlexikon, “Case D”