9 material differences · fewer than 12
Tractor oneDeutz (KHD) D 50.1S (D 55)1962–1965No measured PTO figureTractor twoFiat 550 (DT)1968–1978No measured PTO figure
Which should you choose?
Read our verdict on the D 50.1S (D 55) and the 550 (DT) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
9 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | D 50.1S (D 55) | 550 (DT) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 51.1 hp | 51.2 hp | — |
| Engine declared | — | FIAT-IVECO 8045 | — |
| Displacement declared | — | 3.12 L | — |
| Maximum torque declared | — | 137 lb·ft · 186 N·m | — |
| Transmission | |||
| Top speed declared | 12.4–17.4 mph · 20–28 km/h | 15.5 mph · 25 km/h | differs |
| Clutch declared | Double clutch in the flywheel | Dry FEREDO double clutch with separate PTO control | differs |
| Hydraulics & hitch | |||
| Pump flow declared | — | 5.8 gpm · 21.8 L/min | — |
| Pressure declared | — | 2,843 psi · 196 bar | — |
| Rear PTO speeds declared | 540/1060 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 5,004 lb · 2,270 kg | 4,542 lb · 2,060 kg | +10% D 50.1S (D 55) |
| Wheelbase declared | 86.6 in · 2,200 mm | 81.5 in · 2,070 mm | +6% D 50.1S (D 55) |
| Length declared | 146.5 in · 3,720 mm | 135.0 in · 3,430 mm | +8% D 50.1S (D 55) |
| Width declared | 70.9 in · 1,800 mm | 66.5–95.3 in · 1,690–2,420 mm | differs |
| Ground clearance declared | 19.9 in · 505 mm | 16.5 in · 420 mm | +20% D 50.1S (D 55) |
| Turning radius, braked declared | 12.5 ft · 3.80 m | 10.3 ft · 3.13 m | +21% D 50.1S (D 55) |
| Fuel tank declared | — | 57.1 qt · 54.0 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.
Deutz (KHD) D 50.1S (D 55) sources
- Source: Traktorenlexikon, “Deutz D 50.1S (D 55)”
Fiat 550 (DT) sources
- Source: Traktorenlexikon, “Fiat 550/550 DT”