9 material differences · fewer than 12
Tractor oneInternational Harvester 5741970–1975No measured PTO figureTractor twoJ.I. Case 6401960–1969No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1970–1975; 1960–1969). 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
9 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 574 | 640 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 65.0 hp | 52.0 hp | +25% 574 |
| Engine declared | INTERNATIONAL-HARVESTER D-239 | — | — |
| Displacement declared | 3.91 L | — | — |
| Maximum torque declared | 153 lb·ft · 207 N·m | — | — |
| Transmission | |||
| Top speed declared | 15.5–18.6 mph · 25–30 km/h | 12.4–21.7 mph · 20–35 km/h | differs |
| Clutch declared | pedal-operated dry single-disc clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 11.4–12.6 gpm · 43.1–47.7 L/min | 9.3 gpm · 35.2 L/min | differs |
| Rear PTO speeds declared | 540/1000 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 5,163 lb · 2,342 kg | 4,495 lb · 2,039 kg | +15% 574 |
| Wheelbase declared | 85.0 in · 2,160 mm | 79.3 in · 2,013 mm | +7% 574 |
| Length declared | 139.0 in · 3,531 mm | 134.5 in · 3,416 mm | — |
| Width declared | 69.0 in · 1,753 mm | 80.7 in · 2,051 mm | +17% 640 |
| Ground clearance declared | 16.0 in · 406 mm | 20.9 in · 530 mm | +31% 640 |
| Turning radius, braked declared | 9.0 ft · 2.74 m | 9.8 ft · 3.00 m | +9% 640 |
| Fuel tank declared | 81.7 qt · 77.3 L | 69.2 qt · 65.5 L | +18% 574 |
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 574 sources
- Source: Traktorenlexikon, “IHC 574”
- Source: Traktorenlexikon, “IHC 574 (USA)”
J.I. Case 640 sources
- Source: Traktorenlexikon, “Case 640”