Fiat 550 (DT) or International Harvester W-450?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the 550 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the W-450 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 | 550 (DT) | W-450 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 38.2 kW (51.2 hp)Traktorenlexikon, “Fiat 550/550 DT” | 38.2 kW (51.2 hp)Traktorenlexikon, “IHC International W-450” | Not comparableNot comparable on power at the PTO shaft: the 550 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the W-450 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 550 (DT) and the W-450. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the 550 (DT) and the W-450. |
| Which pumps more oil for implements? | 21.8 L/min (5.8 gpm)Traktorenlexikon, “Fiat 550/550 DT” | — | No figureNo call on hydraulic flow: no figure on record for the W-450. |
| Which lifts more on the three-point hitch? | 1,820 kg (4,012 lb)Traktorenlexikon, “Fiat 550/550 DT” | 905 kg (1,995 lb)Traktorenlexikon, “IHC International W-450” | Not comparableNot comparable on three-point lift: the 550 (DT): lift at the hitch ends, as stated by the source (Traktorenlexikon, “Fiat 550/550 DT”); the W-450: lift at an unstated point, as stated by the source (Traktorenlexikon, “IHC International W-450”) — not the same quantity, basis and condition. |
| Which is heavier, for traction? | 2,060 kg (4,542 lb)Traktorenlexikon, “Fiat 550/550 DT” | 2,595 kg (5,721 lb)Traktorenlexikon, “IHC International W-450” | Ahead (a fact, not an advantage)The International Harvester W-450 is 26% heavier (535 kg / 1,179 lb) than the Fiat 550 (DT) (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 550 (DT) and the W-450. |
| Which has the wider choice of gears? | 8 to 12Traktorenlexikon, “Fiat 550/550 DT” | 5 to 10Traktorenlexikon, “IHC International W-450” | 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 550 (DT) and the W-450. |
| Which is faster on the road? | 25 km/h (15.5 mph)Traktorenlexikon, “Fiat 550/550 DT” | 26 km/h (16.2 mph)Traktorenlexikon, “IHC International W-450” | 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 rpmTraktorenlexikon, “Fiat 550/550 DT” | 539 rpmTraktorenlexikon, “IHC International W-450” | No figureNo call on PTO speeds: no standard PTO speed stated for the W-450. |
| Which PTO runs independently of the ground drive? | — | — | No figureNo call on PTO independence: not stated for the 550 (DT) and the W-450. |
| Which drives on both axles? | Two-wheel or four-wheel driveTraktorenlexikon, “Fiat 550/550 DT” | 2WDTraktorenlexikon, “IHC International W-450” | AheadThe Fiat 550 (DT) is available with four-wheel drive; the International Harvester W-450 is two-wheel drive (as stated by the sources). |
| Which is newer, and what about parts? | 1968–1978 | 1956–1958 | Ahead (a fact, not an advantage)The Fiat 550 (DT) is newer: production began 12 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The International Harvester W-450 is 26% heavier (535 kg / 1,179 lb) than the Fiat 550 (DT) (both unladen weight, as stated by the source).
- The Fiat 550 (DT) is available with four-wheel drive; the International Harvester W-450 is two-wheel drive (as stated by the sources).
- The Fiat 550 (DT) is newer: production began 12 years later. We hold no parts-availability data, so there is no call on parts.
- 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 difference is under the 10% threshold, too small to call.
- Not comparable on power at the PTO shaft: the 550 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the W-450 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- Not comparable on three-point lift: the 550 (DT): lift at the hitch ends, as stated by the source (Traktorenlexikon, “Fiat 550/550 DT”); the W-450: lift at an unstated point, as stated by the source (Traktorenlexikon, “IHC International W-450”) — not the same quantity, basis and condition.
- 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, PTO speeds and PTO independence.
← Every figure for both machines, side by side, with sources