10 material differences · fewer than 12
Tractor oneIMR-RAKOVICA R-471984–1994No measured PTO figureTractor twoMassey Ferguson MF 5501976–1982No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1984–1994; 1976–1982). 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
10 material differences · 5 fields identical or within 5%, which is not counted as material
| Field | R-47 | MF 550 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 45.3 hp | 46.4 hp | — |
| Engine declared | IMR-PERKINS DM-33/T | Perkins AD 3.152 S | differs |
| Displacement declared | 2.50 L | 2.50 L | — |
| Maximum torque declared | 107 lb·ft · 145 N·m | 130 lb·ft · 176.8 N·m | +22% MF 550 |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5 mph · 25 km/h | — |
| Clutch declared | Pedal-operated, two-stage dry KRON-NOVI double clutch | Pedal-operated, dry and air-cooled single-disc clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 6.9 gpm · 26.0 L/min | — | — |
| Three-point lift, at the coupling points declared | 3,058 lb · 1,387 kg | 3,417 lb · 1,550 kg | +12% MF 550 |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,597 lb · 2,085 kg | 4,982 lb · 2,260 kg | +8% MF 550 |
| Wheelbase declared | 77.4 in · 1,965 mm | 82.0 in · 2,083 mm | +6% MF 550 |
| Length declared | 137.8 in · 3,500 mm | 140.0 in · 3,556 mm | — |
| Width declared | 74.0–91.7 in · 1,880–2,330 mm | 65.0 in · 1,650 mm | differs |
| Ground clearance declared | 16.3 in · 415 mm | 13.0 in · 330 mm | +26% R-47 |
| Turning radius, braked declared | 10.4 ft · 3.18 m | 11.6 ft · 3.53 m | +11% MF 550 |
| Fuel tank declared | 63.4 qt · 60.0 L | 71.1 qt · 67.3 L | +12% 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.
IMR-RAKOVICA R-47 sources
- Source: Traktorenlexikon, “Rakovica R 47”
Massey Ferguson MF 550 sources
- Source: Traktorenlexikon, “Massey Ferguson MF 550”
- Source: Traktorenlexikon, “Massey Ferguson MF 255”