8 material differences · fewer than 12
Tractor oneJ.I. Case 4011955–1957No measured PTO figureTractor twoJ.I. Case 6401960–1969No measured PTO figure
Which should you choose?
Read our verdict on the 401 and the 640 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
8 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 401 | 640 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 49.3 hp | 52.0 hp | +5% 640 |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 12.4–21.7 mph · 20–35 km/h | differs |
| Clutch declared | Pedal-operated single-plate clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 12.0 gpm · 45.4 L/min | 9.3 gpm · 35.2 L/min | +29% 401 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 6,583 lb · 2,986 kg | 4,495 lb · 2,039 kg | +46% 401 |
| Wheelbase declared | 91.5 in · 2,324 mm | 79.3 in · 2,013 mm | +15% 401 |
| Length declared | 142.6 in · 3,622 mm | 134.5 in · 3,416 mm | +6% 401 |
| Width declared | 85.2 in · 2,164 mm | 80.7 in · 2,051 mm | +6% 401 |
| Ground clearance declared | 24.2 in · 615 mm | 20.9 in · 530 mm | +16% 401 |
| Turning radius, braked declared | — | 9.8 ft · 3.00 m | — |
| Fuel tank declared | 84.0 qt · 79.5 L | 69.2 qt · 65.5 L | +21% 401 |
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.
J.I. Case 401 sources
Source
- Source: Traktorenlexikon, “Case 401”
J.I. Case 640 sources
Source
- Source: Traktorenlexikon, “Case 640”