7 material differences · fewer than 12
Tractor oneInternational Harvester 856 (4WD)1967–1971No measured PTO figureTractor twoInternational Harvester 9661971–1974No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their unladen weight differs by more than 25% (35%); the drive differs (Two-wheel or four-wheel drive; 2WD). 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
7 material differences · 6 fields identical or within 5%, which is not counted as material
| Field | 856 (4WD) | 966 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 101 hp | 95.6 hp | — |
| Engine declared | INTERNATIONAL HARVESTER C-301 | INTERNATIONAL HARVESTER D-414 | differs |
| Displacement declared | — | 6.78 L | — |
| Maximum torque declared | 326 lb·ft · 442 N·m | 305 lb·ft · 414 N·m | +7% 856 (4WD) |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 18.6 mph · 30 km/h | — |
| Clutch declared | — | Pedal-operated DYNA-LIFE clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 12.0 gpm · 45.5 L/min | 12.0 gpm · 45.5 L/min | — |
| Rear PTO speeds declared | 540/1000 rpm | 540/1000 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 8,600 lb · 3,901 kg | 11,625 lb · 5,273 kg | +35% 966 |
| Wheelbase declared | 101.0 in · 2,565 mm | 104.8 in · 2,662 mm | — |
| Length declared | 167.0 in · 4,242 mm | 165.0 in · 4,191 mm | — |
| Width declared | 80.0 in · 2,032 mm | 98.0 in · 2,489 mm | +22% 966 |
| Ground clearance declared | 22.0 in · 559 mm | 14.0 in · 356 mm | +57% 856 (4WD) |
| Turning radius, braked declared | 11.0 ft · 3.35 m | 11.8 ft · 3.61 m | +8% 966 |
| Fuel tank declared | 168.0 qt · 159.0 L | 147.9 qt · 140.0 L | +14% 856 (4WD) |
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 856 (4WD) sources
- Source: Traktorenlexikon, “IHC 856”
- Source: Traktorenlexikon, “IHC 806”
International Harvester 966 sources
- Source: Traktorenlexikon, “Farmall Farmall 966”
- Source: Traktorenlexikon, “IHC 966”