Fiat 666 (DT) or Renault 681 (S)?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the 666 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 681 (S) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- The Fiat 666 (DT) suits loader and hydraulic implement work better on this data: 30% (730 kg / 1,609 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 | 666 (DT) | 681 (S) | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 50 kW (67 hp)Traktorenlexikon, “Fiat 666/666 DT” | 50 kW (67 hp)Traktorenlexikon, “Renault 681 R7491” | Not comparableNot comparable on power at the PTO shaft: the 666 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 681 (S) 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 666 (DT) and the 681 (S). |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the 666 (DT) and the 681 (S). |
| Which pumps more oil for implements? | — | 28.8 L/min (7.6 gpm)Traktorenlexikon, “Renault 681 R7491” | No figureNo call on hydraulic flow: no figure on record for the 666 (DT). |
| Which lifts more on the three-point hitch? | 3,140 kg (6,923 lb)Traktorenlexikon, “Fiat 666/666 DT” | 2,410 kg (5,313 lb)Traktorenlexikon, “Renault 681 R7491” | AheadThe Fiat 666 (DT) has 30% more lift (730 kg / 1,609 lb) than the Renault 681 (S) (both lift at the hitch ends, as stated by the source). |
| Which is heavier, for traction? | 2,580 kg (5,688 lb)Traktorenlexikon, “Fiat 666/666 DT” | 2,860 kg (6,305 lb)Traktorenlexikon, “Renault 681 R7491” | Ahead (a fact, not an advantage)The Renault 681 (S) is 11% heavier (280 kg / 617 lb) than the Fiat 666 (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 666 (DT) and the 681 (S). |
| Which has the wider choice of gears? | 12 to 20Traktorenlexikon, “Fiat 666/666 DT” | 12Traktorenlexikon, “Renault 681 R7491” | 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? | — | YesTraktorenlexikon, “Renault 681 R7491” | No figureNo call on a creeper range: not stated for the 666 (DT). |
| Which is faster on the road? | 25 km/h (15.5 mph) to 30 km/h (18.6 mph)Traktorenlexikon, “Fiat 666/666 DT” | 25 km/h (15.5 mph)Traktorenlexikon, “Renault 681 R7491” | 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 rpmTraktorenlexikon, “Fiat 666/666 DT” | 540 rpmTraktorenlexikon, “Renault 681 R7491” | EvenEven on PTO speeds: the same speeds (540 rpm). |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “Fiat 666/666 DT” | independentTraktorenlexikon, “Renault 681 R7491” | EvenEven on PTO independence: every PTO is independent. |
| Which drives on both axles? | Two-wheel or four-wheel driveTraktorenlexikon, “Fiat 666/666 DT” | 2WDTraktorenlexikon, “Renault 681 R7491” | AheadThe Fiat 666 (DT) is available with four-wheel drive; the Renault 681 (S) is two-wheel drive (as stated by the sources). |
| Which is newer, and what about parts? | 1982–1986 | 1979–1986 | EvenSame era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The Fiat 666 (DT) has 30% more lift (730 kg / 1,609 lb) than the Renault 681 (S) (both lift at the hitch ends, as stated by the source).
- The Renault 681 (S) is 11% heavier (280 kg / 617 lb) than the Fiat 666 (DT) (both unladen weight, as stated by the source).
- The Fiat 666 (DT) is available with four-wheel drive; the Renault 681 (S) is two-wheel drive (as stated by the sources).
- 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 PTO speeds: the same speeds (540 rpm).
- Even on PTO independence: every PTO is independent.
- Same era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts.
- Not comparable on power at the PTO shaft: the 666 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 681 (S) 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 and a creeper range.
← Every figure for both machines, side by side, with sources