Bührer PF-21 Super (A) or Renault 651 (S)?
Which should you choose?
On performance, every comparable figure that differs favours the Renault 651 (S): hydraulic flow. On features, the Bührer PF-21 Super (A) is ahead on drive.
- The Renault 651 (S) suits loader and hydraulic implement work better on this data: 33% (6.5 L/min / 1.7 gpm) more hydraulic flow.
- The Bührer PF-21 Super (A) suits heavy draft work (ploughing, cultivating) better on this data: four-wheel drive.
Generated by rule set compare@4 from the figures on the side-by-side table, allowed by route “the same stated configuration”. Measured figures are compared only with measured, claimed only with claimed, at the same test condition; differences within each figure’s tolerance are not called.
What decides it, question by question?
| Question | PF-21 Super (A) | 651 (S) | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 43.9 kW (58.9 hp)Traktorenlexikon, “Bührer PF 21 Super(A)” | 43.9 kW (58.9 hp)Traktorenlexikon, “Renault 651 R7461” | EvenEven on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, too small to call. |
| Which turns a litre of fuel into more work at the shaft? | — | — | No figureNo call on fuel efficiency at the shaft: no figure on record for the PF-21 Super (A) and the 651 (S). |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the PF-21 Super (A) and the 651 (S). |
| Which pumps more oil for implements? | 19.5 L/min (5.2 gpm)Traktorenlexikon, “Bührer PF 21 Super(A)” | 26.0 L/min (6.9 gpm)Traktorenlexikon, “Renault 651 R7461” | AheadThe Renault 651 (S) has 33% more hydraulic flow (6.5 L/min / 1.7 gpm) than the Bührer PF-21 Super (A) (both pump flow, as stated by the source). |
| Which lifts more on the three-point hitch? | 2,350 kg (5,181 lb)Traktorenlexikon, “Bührer PF 21 Super(A)” | 2,240 kg (4,938 lb)Traktorenlexikon, “Renault 651 R7461” | EvenEven on three-point lift (both lift at the hitch ends, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which is heavier, for traction? | 2,430 kg (5,357 lb)Traktorenlexikon, “Bührer PF 21 Super(A)” | 2,670 kg (5,886 lb)Traktorenlexikon, “Renault 651 R7461” | EvenEven on weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which may carry more ballast and load? | — | — | No figureNo call on maximum permissible mass: no figure on record for the PF-21 Super (A) and the 651 (S). |
| Which has the wider choice of gears? | 15Traktorenlexikon, “Bührer PF 21 Super(A)” | 12Traktorenlexikon, “Renault 651 R7461” | EvenEven on forward gears (both forward gears, as stated by the source): the difference is under the 25% threshold, too small to call. |
| Which offers a creeper range? | — | YesTraktorenlexikon, “Renault 651 R7461” | No figureNo call on a creeper range: not stated for the PF-21 Super (A). |
| Which is faster on the road? | 25 km/h (15.5 mph)Traktorenlexikon, “Bührer PF 21 Super(A)” | 25 km/h (15.5 mph)Traktorenlexikon, “Renault 651 R7461” | EvenEven on top speed (both top speed forward, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which offers more PTO speeds? | 540/770 rpmTraktorenlexikon, “Bührer PF 21 Super(A)” | 540 rpmTraktorenlexikon, “Renault 651 R7461” | EvenEven on PTO speeds: the same speeds (540 rpm). |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “Bührer PF 21 Super(A)” | independentTraktorenlexikon, “Renault 651 R7461” | EvenEven on PTO independence: every PTO is independent. |
| Which drives on both axles? | 2WD / 4WDTraktorenlexikon, “Bührer PF 21 Super(A)” | 2WDTraktorenlexikon, “Renault 651 R7461” | AheadThe Bührer PF-21 Super (A) is available with four-wheel drive; the Renault 651 (S) is two-wheel drive (as stated by the sources). |
| Which is newer, and what about parts? | 1968–1974 | 1972–1986 | EvenSame era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The Renault 651 (S) has 33% more hydraulic flow (6.5 L/min / 1.7 gpm) than the Bührer PF-21 Super (A) (both pump flow, as stated by the source).
- The Bührer PF-21 Super (A) is available with four-wheel drive; the Renault 651 (S) is two-wheel drive (as stated by the sources).
- Even on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, too small to call.
- Even on three-point lift (both lift at the hitch ends, as stated by the source): the difference is under the 10% threshold, too small to call.
- Even on weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, too small to call.
- Even on forward gears (both forward gears, as stated by the source): the difference is under the 25% threshold, too small to call.
- Even on top speed (both top speed forward, as stated by the source): the difference is under the 10% threshold, too small to call.
- Even on PTO speeds: the same speeds (540 rpm).
- Even on PTO independence: every PTO is independent.
- Same era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, maximum permissible mass and a creeper range.
← Every figure for both machines, side by side, with sources