8 material differences · fewer than 12
Tractor oneJ.I. Case 5311960–1969No measured PTO figureTractor twoUTB U 4451974–1981No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1960–1969; 1974–1981). 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
8 material differences · 2 fields identical or within 5%, which is not counted as material
| Field | 531 | U 445 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 39.8 hp | 42.4 hp | +6% U 445 |
| Engine declared | — | UTB D-115 | — |
| Displacement declared | — | 2.34 L | — |
| Maximum torque declared | — | 103 lb·ft · 140 N·m | — |
| Transmission | |||
| Top speed declared | 12.4–21.7 mph · 20–35 km/h | 15.5 mph · 25 km/h | differs |
| Clutch declared | — | Pedal-operated two-stage dry double clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 9.3 gpm · 35.2 L/min | 5.8 gpm · 21.8 L/min | +61% 531 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,116 lb · 1,867 kg | 4,057 lb · 1,840 kg | — |
| Wheelbase declared | 86.3 in · 2,191 mm | 75.6 in · 1,920 mm | +14% 531 |
| Length declared | 130.0 in · 3,302 mm | 115.0 in · 2,920 mm | +13% 531 |
| Width declared | 79.6 in · 2,022 mm | 59.6–87.2 in · 1,515–2,215 mm | differs |
| Ground clearance declared | 21.0 in · 533 mm | 18.3 in · 465 mm | +15% 531 |
| Turning radius, braked declared | 7.9 ft · 2.41 m | 9.9 ft · 3.02 m | +25% U 445 |
| Fuel tank declared | 69.2 qt · 65.5 L | 57.1 qt · 54.0 L | +21% 531 |
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 531 sources
- Source: Traktorenlexikon, “Case 531”
UTB U 445 sources
- Source: Traktorenlexikon, “UTB U 445”