8 material differences · fewer than 12
Tractor oneBührer RP-21 Super (A)1969–1975No measured PTO figureTractor twoDeutz-Fahr D 6907 A ( C )1983–1984No measured PTO figure
Which should you choose?
Read our verdict on the RP-21 Super (A) and the D 6907 A ( C ) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
8 material differences · 2 fields identical or within 5%, which is not counted as material
| Field | RP-21 Super (A) | D 6907 A ( C ) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 71 hp | 68 hp | — |
| Engine declared | Perkins A 4.248 | KHD F4L 912 | differs |
| Displacement declared | 4.07 L | 3.77 L | +8% RP-21 Super (A) |
| Maximum torque declared | 212 lb·ft · 287 N·m | 175 lb·ft · 237 N·m | +21% RP-21 Super (A) |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5–18.6 mph · 25–30 km/h | differs |
| Hydraulics & hitch | |||
| Hydraulic centre declared | — | Open centre | — |
| Pump flow declared | 5.2 gpm · 19.5 L/min | — | — |
| Pressure declared | 2,845 psi · 196 bar | — | — |
| Rear PTO speeds declared | 540 rpm | — | — |
| Weight & dimensions | |||
| Unladen weight declared | 5,807 lb · 2,634 kg | 6,393 lb · 2,900 kg | +10% D 6907 A ( C ) |
| Maximum permissible mass declared | — | 8,818 lb · 4,000 kg | — |
| Wheelbase declared | 84.5 in · 2,147 mm | 85.8 in · 2,180 mm | — |
| Length declared | 132.3 in · 3,360 mm | 144.3 in · 3,664 mm | +9% D 6907 A ( C ) |
| Width declared | 72.8 in · 1,850 mm | 81.1 in · 2,060 mm | +11% D 6907 A ( C ) |
| Ground clearance declared | 16.1 in · 410 mm | 15.0 in · 380 mm | +8% RP-21 Super (A) |
| Turning radius, braked declared | 10.6 ft · 3.23 m | — | — |
| Fuel tank declared | — | 95.1 qt · 90 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.
Bührer RP-21 Super (A) sources
- Source: Traktorenlexikon, “Bührer RP 21 Super (A)”
- Source: Traktorenlexikon, “Massey Ferguson MF 178”
Deutz-Fahr D 6907 A ( C ) sources
- Source: Traktorenlexikon, “Deutz-Fahr D 6907”
- Source: Traktorenlexikon, “Deutz D 6006”