6 material differences · fewer than 12
Tractor oneInternational Harvester 9661971–1974No measured PTO figureTractor twoJ.I. Case 10311966–1969No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1971–1974; 1966–1969). 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
6 material differences · 4 fields identical or within 5%, which is not counted as material
| Field | 966 | 1031 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 95.6 hp | 102.1 hp | +7% 1031 |
| Engine declared | INTERNATIONAL HARVESTER D-414 | — | — |
| Displacement declared | 6.78 L | — | — |
| Maximum torque declared | 305 lb·ft · 414 N·m | — | — |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 15.5 mph · 25 km/h | +20% 966 |
| Clutch declared | Pedal-operated DYNA-LIFE clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 12.0 gpm · 45.5 L/min | 12.0 gpm · 45.4 L/min | — |
| Rear PTO speeds declared | 540/1000 rpm | 1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 11,625 lb · 5,273 kg | 9,334 lb · 4,234 kg | +25% 966 |
| Wheelbase declared | 104.8 in · 2,662 mm | 108.9 in · 2,767 mm | — |
| Length declared | 165.0 in · 4,191 mm | 165.0 in · 4,191 mm | — |
| Width declared | 98.0 in · 2,489 mm | 88.0 in · 2,235 mm | +11% 966 |
| Ground clearance declared | 14.0 in · 356 mm | 16.0 in · 406 mm | +14% 1031 |
| Turning radius, braked declared | 11.8 ft · 3.61 m | 11.2 ft · 3.43 m | — |
| Fuel tank declared | 147.9 qt · 140.0 L | 192.0 qt · 181.7 L | +30% 1031 |
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 966 sources
- Source: Traktorenlexikon, “Farmall Farmall 966”
- Source: Traktorenlexikon, “IHC 966”
J.I. Case 1031 sources
- Source: Traktorenlexikon, “Case 1031”