ALLIS-CHALMERS Modell-WF or Lanz D 7521/3?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the Modell-WF has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521/3 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 | Modell-WF | D 7521/3 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 18 kW (24 hp)Traktorenlexikon, “Allis-Chalmers WF” | 18.3 kW (24.5 hp)Traktorenlexikon, “Lanz D 7521/3” | Not comparableNot comparable on power at the PTO shaft: the Modell-WF has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521/3 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 Modell-WF and the D 7521/3. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the Modell-WF and the D 7521/3. |
| Which pumps more oil for implements? | — | — | No figureNo call on hydraulic flow: no figure on record for the Modell-WF and the D 7521/3. |
| Which lifts more on the three-point hitch? | — | — | No figureNo call on three-point lift: no figure on record for the Modell-WF and the D 7521/3. |
| Which is heavier, for traction? | 1,583 kg (3,490 lb)Traktorenlexikon, “Allis-Chalmers WF” | 3,050 kg (6,724 lb)Traktorenlexikon, “Lanz D 7521/3” | Ahead (a fact, not an advantage)The Lanz D 7521/3 is 93% heavier (1,467 kg / 3,234 lb) than the ALLIS-CHALMERS Modell-WF (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 Modell-WF and the D 7521/3. |
| Which has the wider choice of gears? | 4Traktorenlexikon, “Allis-Chalmers WF” | 6Traktorenlexikon, “Lanz D 7521/3” | AheadThe Lanz D 7521/3 has 50% more forward gears (2 gears) than the ALLIS-CHALMERS Modell-WF (both forward gears, as stated by the source). |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the Modell-WF and the D 7521/3. |
| Which is faster on the road? | 16 km/h (9.9 mph)Traktorenlexikon, “Allis-Chalmers WF” | 15.9 km/h (9.9 mph)Traktorenlexikon, “Lanz D 7521/3” | 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? | 535 rpmTraktorenlexikon, “Allis-Chalmers WF” | 760Traktorenlexikon, “Lanz D 7521/3” | No figureNo call on PTO speeds: no standard PTO speed stated for the Modell-WF and the D 7521/3. |
| Which PTO runs independently of the ground drive? | — | — | No figureNo call on PTO independence: not stated for the Modell-WF and the D 7521/3. |
| Which drives on both axles? | 2WDTraktorenlexikon, “Allis-Chalmers WF” | 2WDTraktorenlexikon, “Lanz D 7521/3” | EvenEven on drive: all two-wheel drive. |
| Which is newer, and what about parts? | 1937–1951 | 1935–1936 | 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 Lanz D 7521/3 is 93% heavier (1,467 kg / 3,234 lb) than the ALLIS-CHALMERS Modell-WF (both unladen weight, as stated by the source).
- The Lanz D 7521/3 has 50% more forward gears (2 gears) than the ALLIS-CHALMERS Modell-WF (both forward gears, as stated by the source).
- 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: all two-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 Modell-WF has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521/3 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, three-point lift, maximum permissible mass, a creeper range, PTO speeds and PTO independence.
← Every figure for both machines, side by side, with sources