12 material differences
Tractor oneMassey Ferguson MF 5501976–1982No measured PTO figureTractor twoUTB U 4451974–1981No measured PTO figure
Which should you choose?
Read our verdict on the MF 550 and the U 445 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
12 material differences · 2 fields identical or within 5%, which is not counted as material
| Field | MF 550 | U 445 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 46.4 hp | 42.4 hp | +9% MF 550 |
| Engine declared | Perkins AD 3.152 S | UTB D-115 | differs |
| Displacement declared | 2.50 L | 2.34 L | +7% MF 550 |
| Maximum torque declared | 130 lb·ft · 176.8 N·m | 103 lb·ft · 140 N·m | +26% MF 550 |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5 mph · 25 km/h | — |
| Clutch declared | Pedal-operated, dry and air-cooled single-disc clutch | Pedal-operated two-stage dry double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | — | 5.8 gpm · 21.8 L/min | — |
| Three-point lift, at the coupling points declared | 3,417 lb · 1,550 kg | 3,197 lb · 1,450 kg | +7% MF 550 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,982 lb · 2,260 kg | 4,057 lb · 1,840 kg | +23% MF 550 |
| Wheelbase declared | 82.0 in · 2,083 mm | 75.6 in · 1,920 mm | +8% MF 550 |
| Length declared | 140.0 in · 3,556 mm | 115.0 in · 2,920 mm | +22% MF 550 |
| Width declared | 65.0 in · 1,650 mm | 59.6–87.2 in · 1,515–2,215 mm | differs |
| Ground clearance declared | 13.0 in · 330 mm | 18.3 in · 465 mm | +41% U 445 |
| Turning radius, braked declared | 11.6 ft · 3.53 m | 9.9 ft · 3.02 m | +17% MF 550 |
| Fuel tank declared | 71.1 qt · 67.3 L | 57.1 qt · 54.0 L | +25% MF 550 |
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.
Massey Ferguson MF 550 sources
Source
- Source: Traktorenlexikon, “Massey Ferguson MF 550”
- Source: Traktorenlexikon, “Massey Ferguson MF 255”
UTB U 445 sources
Source
- Source: Traktorenlexikon, “UTB U 445”