4 material differences · fewer than 12
Tractor oneInternational Harvester 37881979–1981No measured PTO figureTractor twoInternational Harvester 67881981–1984No measured PTO figure
Which should you choose?
We will not advise between these two machines, because their power is identical, with the same weight or the same engine, which usually means one machine sold under two names; any difference below comes from how each source describes it. 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
4 material differences · 9 fields identical or within 5%, which is not counted as material
| Field | 3788 | 6788 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 170.6 hp | 170.6 hp | — |
| Engine declared | INTERNATIONAL HARVESTER DT-466 B | INTERNATIONAL HARVESTER DT-466 B | — |
| Displacement declared | 7.64 L | 7.64 L | — |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 18.6 mph · 30 km/h | — |
| Clutch declared | — | Pedal operated dry clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 12.0 gpm · 45.4 L/min | 18.0 gpm · 68.1 L/min | +50% 6788 |
| Rear PTO speeds declared | 1000 rpm | 1000 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 18,620 lb · 8,446 kg | 18,620 lb · 8,446 kg | — |
| Wheelbase declared | 110.0 in · 2,794 mm | 110.0 in · 2,794 mm | — |
| Length declared | 228.0 in · 5,791 mm | 228.3 in · 5,799 mm | — |
| Width declared | 101.6 in · 2,581 mm | 112.0 in · 2,845 mm | +10% 6788 |
| Height, over the cab declared | 115.8 in · 2,941 mm | 115.8 in · 2,941 mm | — |
| Ground clearance declared | 23.2 in · 589 mm | 28.4 in · 721 mm | +22% 6788 |
| Fuel tank declared | 360.0 qt · 340.7 L | 356.1–555.8 qt · 337.0–526.0 L | differs |
International Harvester 3788 sources
Source
- Source: Traktorenlexikon, “IHC 3788”
- Source: Traktorenlexikon, “IHC 3588”
International Harvester 6788 sources
Source
- Source: Traktorenlexikon, “IHC 6788”
- Source: Traktorenlexikon, “IHC 3588”