11 material differences · fewer than 12
Tractor oneFiat 550 (DT)1968–1978No measured PTO figureTractor twoInternational Harvester Farmall 4501956–1958No measured PTO figure
Which should you choose?
We will not advise between these two machines, because the drive differs (Two-wheel or four-wheel drive; 2WD); they were not built in overlapping years (1968–1978; 1956–1958). 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
11 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 550 (DT) | Farmall 450 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 51.2 hp | 51.2 hp | — |
| Engine declared | FIAT-IVECO 8045 | INTERNATIONAL HARVESTER C-281 | differs |
| Displacement declared | 3.12 L | 4.60 L | +47% Farmall 450 |
| Maximum torque declared | 137 lb·ft · 186 N·m | — | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 16.8 mph · 27 km/h | +8% Farmall 450 |
| Clutch declared | Dry FEREDO double clutch with separate PTO control | Pedal-actuated dry single-disc clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 5.8 gpm · 21.8 L/min | — | — |
| Pressure declared | 2,843 psi · 196 bar | — | — |
| Rear PTO speeds declared | 540 rpm | 539 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 4,542 lb · 2,060 kg | 5,600 lb · 2,540 kg | +23% Farmall 450 |
| Wheelbase declared | 81.5 in · 2,070 mm | 95.7 in · 2,432 mm | +17% Farmall 450 |
| Length declared | 135.0 in · 3,430 mm | 143.0 in · 3,632 mm | +6% Farmall 450 |
| Width declared | 66.5–95.3 in · 1,690–2,420 mm | 84.0 in · 2,134 mm | differs |
| Ground clearance declared | 16.5 in · 420 mm | 23.0 in · 584 mm | +39% Farmall 450 |
| Turning radius, braked declared | 10.3 ft · 3.13 m | — | — |
| Fuel tank declared | 57.1 qt · 54.0 L | 79.3 qt · 75.0 L | +39% Farmall 450 |
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.
Fiat 550 (DT) sources
- Source: Traktorenlexikon, “Fiat 550/550 DT”
International Harvester Farmall 450 sources
- Source: Traktorenlexikon, “IHC Farmall 450”
- Source: Traktorenlexikon, “Farmall Farmall 450”