8 material differences · fewer than 12
Tractor oneBührer PF-21 Super (A)1968–1974No measured PTO figureTractor twoInternational Harvester 6741973–1975No measured PTO figure
Which should you choose?
Read our verdict on the PF-21 Super (A) and the 674 → 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 | PF-21 Super (A) | 674 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 66.1 hp | 64.1 hp | — |
| Engine declared | FORD (GB) 2.514 E | INTERNATIONAL-HARVESTER D-239 | differs |
| Displacement declared | 4.18 L | 3.91 L | +7% PF-21 Super (A) |
| Maximum torque declared | 183 lb·ft · 248 N·m | 153 lb·ft · 207 N·m | +20% PF-21 Super (A) |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5–18.6 mph · 25–30 km/h | differs |
| Clutch declared | Pedal-operated dry Buhrer double disc clutch between gearbox and group transmission | Pedal-operated dry LAYCOCK single-plate clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 5.2 gpm · 19.5 L/min | 11.1–12.6 gpm · 42.1–47.7 L/min | differs |
| Rear PTO speeds declared | 540/770 rpm | 540/1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 5,357 lb · 2,430 kg | 5,106 lb · 2,316 kg | — |
| Wheelbase declared | 84.3 in · 2,140 mm | 84.5 in · 2,146 mm | — |
| Length declared | 129.5 in · 3,290 mm | 140.6 in · 3,570 mm | +9% 674 |
| Width declared | 69.3 in · 1,760 mm | 68.9 in · 1,750 mm | — |
| Ground clearance declared | 15.0 in · 380 mm | 14.4 in · 365 mm | — |
| Turning radius, braked declared | 10.9 ft · 3.33 m | 10.9 ft · 3.31 m | — |
| Fuel tank declared | — | 81.2 qt · 76.8 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.
Bührer PF-21 Super (A) sources
- Source: Traktorenlexikon, “Bührer PF 21 Super(A)”
International Harvester 674 sources
- Source: Traktorenlexikon, “IHC 674”
- Source: Traktorenlexikon, “IHC 574”
- Source: Traktorenlexikon, “IHC 674 (USA)”