Bührer GM-29 Super-Six (A) or J.I. Case 931 GP?
Which should you choose?
On performance, every comparable figure that differs favours the J.I. Case 931 GP: hydraulic flow. It is also ahead on top speed and PTO speeds. On features, the Bührer GM-29 Super-Six (A) is ahead on forward gears and drive.
- The J.I. Case 931 GP suits PTO-driven implements (mowers, balers, pumps) better on this data: offers 1000 rpm.
- The J.I. Case 931 GP suits loader and hydraulic implement work better on this data: 212% (39.9 L/min / 10.5 gpm) more hydraulic flow.
- The J.I. Case 931 GP suits road haulage better on this data: 14% (3.0 km/h / 1.9 mph) more top speed.
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 | GM-29 Super-Six (A) | 931 GP | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 59.1 kW (79.2 hp)Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 61.8 kW (82.9 hp)Traktorenlexikon, “Case 931” | 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 GM-29 Super-Six (A) and the 931 GP. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the GM-29 Super-Six (A) and the 931 GP. |
| Which pumps more oil for implements? | 18.8 L/min (5.0 gpm)Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 58.7 L/min (15.5 gpm)Traktorenlexikon, “Case 931” | AheadThe J.I. Case 931 GP has 212% more hydraulic flow (39.9 L/min / 10.5 gpm) than the Bührer GM-29 Super-Six (A) (both pump flow, as stated by the source). |
| Which lifts more on the three-point hitch? | 2,450 kg (5,401 lb)Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | — | No figureNo call on three-point lift: no figure on record for the 931 GP. |
| Which is heavier, for traction? | 2,810 kg (6,195 lb)Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 4,044 kg (8,915 lb)Traktorenlexikon, “Case 931” | Ahead (a fact, not an advantage)The J.I. Case 931 GP is 44% heavier (1,234 kg / 2,721 lb) than the Bührer GM-29 Super-Six (A) (both unladen weight, as stated by the source). |
| Which may carry more ballast and load? | — | — | No figureNo call on maximum permissible mass: no figure on record for the GM-29 Super-Six (A) and the 931 GP. |
| Which has the wider choice of gears? | 15Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 6 to 8Traktorenlexikon, “Case 931” | AheadThe Bührer GM-29 Super-Six (A) has 88% more forward gears (7 gears) than the J.I. Case 931 GP (both forward gears, as stated by the source). |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the GM-29 Super-Six (A) and the 931 GP. |
| Which is faster on the road? | 22 km/h (13.7 mph)Traktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 25 km/h (15.5 mph)Traktorenlexikon, “Case 931” | AheadThe J.I. Case 931 GP has 14% more top speed (3.0 km/h / 1.9 mph) than the Bührer GM-29 Super-Six (A) (both top speed forward, as stated by the source). |
| Which offers more PTO speeds? | 540 rpmTraktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 540/1000 rpmTraktorenlexikon, “Case 931” | AheadThe J.I. Case 931 GP offers 1000 rpm at the PTO, which the Bührer GM-29 Super-Six (A) does not (as stated by the sources). |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | independentTraktorenlexikon, “Case 931” | EvenEven on PTO independence: every PTO is independent. |
| Which drives on both axles? | 2WD / 4WDTraktorenlexikon, “Bührer GM 29 SUPER-SIX (A)” | 2WDTraktorenlexikon, “Case 931” | AheadThe Bührer GM-29 Super-Six (A) is available with four-wheel drive; the J.I. Case 931 GP is two-wheel drive (as stated by the sources). |
| Which is newer, and what about parts? | 1968–1975 | 1959–1969 | Ahead (a fact, not an advantage)The Bührer GM-29 Super-Six (A) is newer: production began 9 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The J.I. Case 931 GP has 212% more hydraulic flow (39.9 L/min / 10.5 gpm) than the Bührer GM-29 Super-Six (A) (both pump flow, as stated by the source).
- The J.I. Case 931 GP is 44% heavier (1,234 kg / 2,721 lb) than the Bührer GM-29 Super-Six (A) (both unladen weight, as stated by the source).
- The Bührer GM-29 Super-Six (A) has 88% more forward gears (7 gears) than the J.I. Case 931 GP (both forward gears, as stated by the source).
- The J.I. Case 931 GP has 14% more top speed (3.0 km/h / 1.9 mph) than the Bührer GM-29 Super-Six (A) (both top speed forward, as stated by the source).
- The J.I. Case 931 GP offers 1000 rpm at the PTO, which the Bührer GM-29 Super-Six (A) does not (as stated by the sources).
- The Bührer GM-29 Super-Six (A) is available with four-wheel drive; the J.I. Case 931 GP is two-wheel drive (as stated by the sources).
- The Bührer GM-29 Super-Six (A) is newer: production began 9 years later. We hold no parts-availability data, so there is no call on parts.
- 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 PTO independence: every PTO is independent.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, three-point lift, maximum permissible mass and a creeper range.
← Every figure for both machines, side by side, with sources