Fiat 55-66 (DT) or SOMECA 540 (TD)?
Which should you choose?
On performance, no comparable figure differs by more than its threshold: on this data the machines are level. On features, the Fiat 55-66 (DT) is ahead on PTO speeds.
- The Fiat 55-66 (DT) suits PTO-driven implements (mowers, balers, pumps) better on this data: offers 1000 rpm.
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 | 55-66 (DT) | 540 (TD) | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 33.4 kW (44.8 hp)Traktorenlexikon, “Fiat 55-66/55-66 DT” | 33.3 kW (44.7 hp)Traktorenlexikon, “Someca 540” | 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 55-66 (DT) and the 540 (TD). |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the 55-66 (DT) and the 540 (TD). |
| Which pumps more oil for implements? | — | 21.8 L/min (5.8 gpm)Traktorenlexikon, “Someca 540” | No figureNo call on hydraulic flow: no figure on record for the 55-66 (DT). |
| Which lifts more on the three-point hitch? | 2,260 kg (4,982 lb)Traktorenlexikon, “Fiat 55-66/55-66 DT” | 1,620 kg (3,571 lb)Traktorenlexikon, “Someca 540” | Not comparableNot comparable on three-point lift: the 55-66 (DT): lift 610 mm behind the hitch ends, as stated by the source (Traktorenlexikon, “Fiat 55-66/55-66 DT”); the 540 (TD): lift at the hitch ends, as stated by the source (Traktorenlexikon, “Someca 540”) — not the same quantity, basis and condition. |
| Which is heavier, for traction? | 2,255 kg (4,971 lb)Traktorenlexikon, “Fiat 55-66/55-66 DT” | 1,865 kg (4,112 lb)Traktorenlexikon, “Someca 540” | Ahead (a fact, not an advantage)The Fiat 55-66 (DT) is 21% heavier (390 kg / 860 lb) than the SOMECA 540 (TD) (both unladen weight, as stated by the source). |
| Which may carry more ballast and load? | 4,200 kg (9,259 lb)Traktorenlexikon, “Fiat 55-66/55-66 DT” | — | No figureNo call on maximum permissible mass: no figure on record for the 540 (TD). |
| Which has the wider choice of gears? | 12 to 20Traktorenlexikon, “Fiat 55-66/55-66 DT” | 8 to 12Traktorenlexikon, “Someca 540” | 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 55-66 (DT) and the 540 (TD). |
| Which is faster on the road? | 25 km/h (15.5 mph) to 40 km/h (24.9 mph)Traktorenlexikon, “Fiat 55-66/55-66 DT” | 25 km/h (15.5 mph)Traktorenlexikon, “Someca 540” | 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, “Fiat 55-66/55-66 DT” | 540 rpmTraktorenlexikon, “Someca 540” | AheadThe Fiat 55-66 (DT) offers 1000 rpm at the PTO, which the SOMECA 540 (TD) does not (as stated by the sources). |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “Fiat 55-66/55-66 DT” | — | No figureNo call on PTO independence: not stated for the 540 (TD). |
| Which drives on both axles? | Two-wheel or four-wheel driveTraktorenlexikon, “Fiat 55-66/55-66 DT” | Two-wheel or four-wheel driveTraktorenlexikon, “Someca 540” | EvenEven on drive: every machine is available with four-wheel drive. |
| Which is newer, and what about parts? | 1985–1992 | 1973–1982 | Ahead (a fact, not an advantage)The Fiat 55-66 (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 Fiat 55-66 (DT) is 21% heavier (390 kg / 860 lb) than the SOMECA 540 (TD) (both unladen weight, as stated by the source).
- The Fiat 55-66 (DT) offers 1000 rpm at the PTO, which the SOMECA 540 (TD) does not (as stated by the sources).
- The Fiat 55-66 (DT) is newer: production began 12 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 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 three-point lift: the 55-66 (DT): lift 610 mm behind the hitch ends, as stated by the source (Traktorenlexikon, “Fiat 55-66/55-66 DT”); the 540 (TD): lift at the hitch ends, as stated by the source (Traktorenlexikon, “Someca 540”) — 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 and PTO independence.
← Every figure for both machines, side by side, with sources