8 material differences · fewer than 12
Tractor oneInternational Harvester 6841977–1981No measured PTO figureTractor twoSOMECA 680 (TD)1978–1983No measured PTO figure
Which should you choose?
Read our verdict on the 684 and the 680 (TD) → 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 · 6 fields identical or within 5%, which is not counted as material
| Field | 684 | 680 (TD) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 68.0 hp | 67 hp | — |
| Engine declared | INTERNATIONAL-HARVESTER D-239 | FIAT-IVECO 8045.02.270 (370) | differs |
| Displacement declared | 3.91 L | 3.46 L | +13% 684 |
| Maximum torque declared | 162 lb·ft · 220 N·m | — | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5 mph · 25 km/h | — |
| Clutch declared | — | Dry FERODO double clutch | — |
| Hydraulics & hitch | |||
| Pump flow declared | 9.9 gpm · 37.5 L/min | 6.8 gpm · 25.8 L/min | +45% 684 |
| Pressure declared | 2,698 psi · 186 bar | 2,843 psi · 196 bar | +5% 680 (TD) |
| Rear PTO speeds declared | 540/1000 rpm | 540/1000 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 5,181 lb · 2,350 kg | 5,512 lb · 2,500 kg | +6% 680 (TD) |
| Wheelbase declared | 88.0 in · 2,235 mm | 89.2 in · 2,265 mm | — |
| Length declared | 146.5 in · 3,720 mm | 154.3 in · 3,920 mm | +5% 680 (TD) |
| Width declared | 70.1 in · 1,780 mm | 80.3 in · 2,040 mm | +15% 680 (TD) |
| Ground clearance declared | 14.6 in · 370 mm | 20.0 in · 508 mm | +37% 680 (TD) |
| Turning radius, braked declared | 10.9 ft · 3.33 m | 11.2 ft · 3.40 m | — |
| Fuel tank declared | 81.4 qt · 77.0 L | 84.5 qt · 80.0 L | — |
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 684 sources
- Source: Traktorenlexikon, “IHC 684”
- Source: Traktorenlexikon, “IHC 574”
SOMECA 680 (TD) sources
- Source: Traktorenlexikon, “Someca 680”
- Source: Traktorenlexikon, “Fiat 680 /680 DT”