Case-Steyr M 958 (a) or Fiat 566 (DT)?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the M 958 (a) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 566 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- The Fiat 566 (DT) suits loader and hydraulic implement work better on this data: 17% (380 kg / 838 lb) more three-point lift.
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 958 (a) | 566 (DT) | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 42.7 kW (57.3 hp)Traktorenlexikon, “Steyr M 958” | 42.7 kW (57.3 hp)Traktorenlexikon, “Fiat 566/566 DT” | Not comparableNot comparable on power at the PTO shaft: the M 958 (a) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 566 (DT) 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 958 (a) and the 566 (DT). |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the M 958 (a) and the 566 (DT). |
| Which pumps more oil for implements? | 30.8 L/min (8.1 gpm)Traktorenlexikon, “Steyr M 958” | — | No figureNo call on hydraulic flow: no figure on record for the 566 (DT). |
| Which lifts more on the three-point hitch? | 2,220 kg (4,894 lb)Traktorenlexikon, “Steyr M 958” | 2,600 kg (5,732 lb)Traktorenlexikon, “Fiat 566/566 DT” | AheadThe Fiat 566 (DT) has 17% more lift (380 kg / 838 lb) than the Case-Steyr M 958 (a) (both lift at the hitch ends, as stated by the source). |
| Which is heavier, for traction? | 2,360 kg (5,203 lb)Traktorenlexikon, “Steyr M 958” | 2,380 kg (5,247 lb)Traktorenlexikon, “Fiat 566/566 DT” | 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? | 4,200 kg (9,259 lb)Traktorenlexikon, “Steyr M 958” | — | No figureNo call on maximum permissible mass: no figure on record for the 566 (DT). |
| Which has the wider choice of gears? | 16 to 32Traktorenlexikon, “Steyr M 958” | 12 to 20Traktorenlexikon, “Fiat 566/566 DT” | EvenEven on forward gears (both forward gears, as stated by the source): the figures vary by configuration and the ranges overlap. |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the M 958 (a) and the 566 (DT). |
| Which is faster on the road? | 30 km/h (18.6 mph) to 40 km/h (24.9 mph)Traktorenlexikon, “Steyr M 958” | 25 km/h (15.5 mph) to 30 km/h (18.6 mph)Traktorenlexikon, “Fiat 566/566 DT” | 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? | 540/1000 rpmTraktorenlexikon, “Steyr M 958” | 540 rpmTraktorenlexikon, “Fiat 566/566 DT” | AheadThe Case-Steyr M 958 (a) offers 1000 rpm at the PTO, which the Fiat 566 (DT) does not (as stated by the sources). |
| Which PTO runs independently of the ground drive? | — | independentTraktorenlexikon, “Fiat 566/566 DT” | No figureNo call on PTO independence: not stated for the M 958 (a). |
| Which drives on both axles? | Two-wheel or four-wheel driveTraktorenlexikon, “Steyr M 958” | Two-wheel or four-wheel driveTraktorenlexikon, “Fiat 566/566 DT” | EvenEven on drive: every machine is available with four-wheel drive. |
| Which is newer, and what about parts? | 1996–2001 | 1982–1986 | Ahead (a fact, not an advantage)The Case-Steyr M 958 (a) is newer: production began 14 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The Fiat 566 (DT) has 17% more lift (380 kg / 838 lb) than the Case-Steyr M 958 (a) (both lift at the hitch ends, as stated by the source).
- The Case-Steyr M 958 (a) offers 1000 rpm at the PTO, which the Fiat 566 (DT) does not (as stated by the sources).
- The Case-Steyr M 958 (a) is newer: production began 14 years later. We hold no parts-availability data, so there is no call on parts.
- 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 figures vary by configuration and the ranges overlap.
- Even on top speed (both top speed forward, as stated by the source): the figures vary by configuration and the ranges overlap.
- Even on drive: every machine is available with four-wheel drive.
- Not comparable on power at the PTO shaft: the M 958 (a) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 566 (DT) 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, hydraulic flow, maximum permissible mass, a creeper range and PTO independence.
← Every figure for both machines, side by side, with sources