Lamborghini R-904 (DT) or Renault 921-4?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the R-904 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 921-4 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- The Renault 921-4 suits loader and hydraulic implement work better on this data: 35% (8.4 L/min / 2.2 gpm) more hydraulic flow.
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 | R-904 (DT) | 921-4 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 67.7 kW (90.8 hp)Traktorenlexikon, “Lamborghini R 904 DT” | 67.7 kW (90.8 hp)Traktorenlexikon, “Renault 921-4 R7684” | Not comparableNot comparable on power at the PTO shaft: the R-904 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 921-4 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 R-904 (DT) and the 921-4. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the R-904 (DT) and the 921-4. |
| Which pumps more oil for implements? | 24.2 L/min (6.4 gpm)Traktorenlexikon, “Lamborghini R 904 DT” | 32.6 L/min (8.6 gpm)Traktorenlexikon, “Renault 921-4 R7684” | AheadThe Renault 921-4 has 35% more hydraulic flow (8.4 L/min / 2.2 gpm) than the Lamborghini R-904 (DT) (both pump flow, as stated by the source). |
| Which lifts more on the three-point hitch? | 2,400 kg (5,291 lb)Traktorenlexikon, “Lamborghini R 904 DT” | 4,590 kg (10,119 lb)Traktorenlexikon, “Renault 921-4 R7684” | Not comparableNot comparable on three-point lift: the R-904 (DT): lift through the full range at the hitch ends, as stated by the source (Traktorenlexikon, “Lamborghini R 904 DT”); the 921-4: lift at the hitch ends, as stated by the source (Traktorenlexikon, “Renault 921-4 R7684”) — not the same quantity, basis and condition. |
| Which is heavier, for traction? | 3,010 kg (6,636 lb)Traktorenlexikon, “Lamborghini R 904 DT” | 4,920 kg (10,847 lb)Traktorenlexikon, “Renault 921-4 R7684” | Ahead (a fact, not an advantage)The Renault 921-4 is 63% heavier (1,910 kg / 4,211 lb) than the Lamborghini R-904 (DT) (both unladen weight, as stated by the source). |
| Which may carry more ballast and load? | — | 8,000 kg (17,637 lb)Traktorenlexikon, “Renault 921-4 R7684” | No figureNo call on maximum permissible mass: no figure on record for the R-904 (DT). |
| Which has the wider choice of gears? | 12Traktorenlexikon, “Lamborghini R 904 DT” | 12 to 16Traktorenlexikon, “Renault 921-4 R7684” | 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 921-4 R7684” | No figureNo call on a creeper range: not stated for the R-904 (DT). |
| Which is faster on the road? | 25 km/h (15.5 mph)Traktorenlexikon, “Lamborghini R 904 DT” | 25 km/h (15.5 mph)Traktorenlexikon, “Renault 921-4 R7684” | 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, “Lamborghini R 904 DT” | 540/1000 rpmTraktorenlexikon, “Renault 921-4 R7684” | AheadThe Renault 921-4 offers 1000 rpm at the PTO, which the Lamborghini R-904 (DT) does not (as stated by the sources). |
| Which PTO runs independently of the ground drive? | — | — | No figureNo call on PTO independence: not stated for the R-904 (DT) and the 921-4. |
| Which drives on both axles? | Two-wheel or four-wheel driveTraktorenlexikon, “Lamborghini R 904 DT” | 4WDTraktorenlexikon, “Renault 921-4 R7684” | EvenEven on drive: every machine is available with four-wheel drive. |
| Which is newer, and what about parts? | 1976–1982 | 1977–1980 | 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 Renault 921-4 has 35% more hydraulic flow (8.4 L/min / 2.2 gpm) than the Lamborghini R-904 (DT) (both pump flow, as stated by the source).
- The Renault 921-4 is 63% heavier (1,910 kg / 4,211 lb) than the Lamborghini R-904 (DT) (both unladen weight, as stated by the source).
- The Renault 921-4 offers 1000 rpm at the PTO, which the Lamborghini R-904 (DT) does not (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 difference is under the 10% threshold, too small to call.
- Even on drive: every machine is available with four-wheel drive.
- 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 R-904 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 921-4 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 R-904 (DT): lift through the full range at the hitch ends, as stated by the source (Traktorenlexikon, “Lamborghini R 904 DT”); the 921-4: lift at the hitch ends, as stated by the source (Traktorenlexikon, “Renault 921-4 R7684”) — 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, maximum permissible mass, a creeper range and PTO independence.
← Every figure for both machines, side by side, with sources