8 material differences · fewer than 12
Tractor oneIMR-RAKOVICA R-60from 1967No measured PTO figureTractor twoPorsche-Diesel Master 4081958–1960No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1967–1967; 1958–1960). 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
8 material differences · 6 fields identical or within 5%, which is not counted as material
| Field | R-60 | Master 408 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 49.3 hp | 49.1 hp | — |
| Engine declared | IMR-PERKINS M-34/T | Porsche-Diesel F 408 | differs |
| Displacement declared | 3.34 L | 3.29 L | — |
| Maximum torque declared | 138 lb·ft · 187 N·m | 132 lb·ft · 178 N·m | — |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 12.1 mph · 19.5 km/h | +54% R-60 |
| Clutch declared | Pedal-operated, two-stage dry IKARUS double clutch | Hydraulic Voith fluid coupling and Fichtel & Sachs double dry clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 9.5 gpm · 36.1 L/min | 6.6 gpm · 25.0 L/min | +44% R-60 |
| Rear PTO speeds declared | 540 rpm | 540 | differs |
| Weight & dimensions | |||
| Unladen weight declared | 4,784 lb · 2,170 kg | 5,401 lb · 2,450 kg | +13% Master 408 |
| Wheelbase declared | 80.7 in · 2,050 mm | 97.0 in · 2,465 mm | +20% Master 408 |
| Length declared | 149.6 in · 3,800 mm | 143.7 in · 3,650 mm | — |
| Width declared | 73.2 in · 1,860 mm | 73.4 in · 1,865 mm | — |
| Ground clearance declared | 17.7 in · 450 mm | 17.2 in · 437 mm | — |
| Turning radius, braked declared | 11.2 ft · 3.41 m | — | — |
| Fuel tank declared | 63.4 qt · 60.0 L | 48.6 qt · 46 L | +30% R-60 |
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-60 sources
- Source: Traktorenlexikon, “Rakovica R 60”
- Source: Traktorenlexikon, “IMT 558”
Porsche-Diesel Master 408 sources
- Source: Traktorenlexikon, “Porsche-Diesel Master N408”