Case-Steyr M 975 a or Deutz-Fahr DX 3.90?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the M 975 a has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the DX 3.90 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
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 | M 975 a | DX 3.90 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 55 kW (74 hp)Traktorenlexikon, “Steyr M 975” | 55 kW (74 hp)Traktorenlexikon, “Deutz-Fahr DX 3.90” | Not comparableNot comparable on power at the PTO shaft: the M 975 a has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the DX 3.90 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft. |
| 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 M 975 a and the DX 3.90. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the M 975 a and the DX 3.90. |
| Which pumps more oil for implements? | 41.4 L/min (10.9 gpm)Traktorenlexikon, “Steyr M 975” | 43.1 L/min (11.4 gpm)Traktorenlexikon, “Deutz-Fahr DX 3.90” | EvenEven on hydraulic flow (both pump flow, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which lifts more on the three-point hitch? | — | 3,300 kg (7,275 lb)Traktorenlexikon, “Deutz-Fahr DX 3.90” | No figureNo call on three-point lift: no figure on record for the M 975 a. |
| Which is heavier, for traction? | 3,100 kg (6,834 lb)Traktorenlexikon, “Steyr M 975” | 3,140 kg (6,923 lb)Traktorenlexikon, “Deutz-Fahr DX 3.90” | 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? | — | 5,000 kg (11,023 lb)Traktorenlexikon, “Deutz-Fahr DX 3.90” | No figureNo call on maximum permissible mass: no figure on record for the M 975 a. |
| Which has the wider choice of gears? | 16 to 32Traktorenlexikon, “Steyr M 975” | 12Traktorenlexikon, “Deutz-Fahr DX 3.90” | AheadThe Case-Steyr M 975a has 33% more forward gears (4 gears) than the Deutz-Fahr DX 3.90 (both forward gears, as stated by the source). |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the M 975 a and the DX 3.90. |
| Which is faster on the road? | 30 km/h (18.6 mph) to 40 km/h (24.9 mph)Traktorenlexikon, “Steyr M 975” | 30 km/h (18.6 mph)Traktorenlexikon, “Deutz-Fahr DX 3.90” | EvenEven on top speed (both top speed forward, as stated by the source): the figures vary by configuration and the ranges overlap. |
| Which offers more PTO speeds? | 540 rpm / 1000 rpmTraktorenlexikon, “Steyr M 975” | 540 rpm / 1000 rpmTraktorenlexikon, “Deutz-Fahr DX 3.90” | EvenEven on PTO speeds: the same speeds (540, 1000 rpm). |
| Which PTO runs independently of the ground drive? | — | independentTraktorenlexikon, “Deutz-Fahr DX 3.90” | No figureNo call on PTO independence: not stated for the M 975 a. |
| Which drives on both axles? | 4WDTraktorenlexikon, “Steyr M 975” | Two-wheel or four-wheel driveTraktorenlexikon, “Deutz-Fahr DX 3.90” | EvenEven on drive: every machine is available with four-wheel drive. |
| Which is newer, and what about parts? | 1995–2004 | 1984–1989 | Ahead (a fact, not an advantage)The Case-Steyr M 975a is newer: production began 11 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The Case-Steyr M 975a has 33% more forward gears (4 gears) than the Deutz-Fahr DX 3.90 (both forward gears, as stated by the source).
- The Case-Steyr M 975a is newer: production began 11 years later. We hold no parts-availability data, so there is no call on parts.
- Even on hydraulic flow (both pump flow, 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 top speed (both top speed forward, as stated by the source): the figures vary by configuration and the ranges overlap.
- Even on PTO speeds: the same speeds (540, 1000 rpm).
- Even on drive: every machine is available with four-wheel drive.
- Not comparable on power at the PTO shaft: the M 975 a has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the DX 3.90 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, three-point lift, maximum permissible mass, a creeper range and PTO independence.
← Every figure for both machines, side by side, with sources