HELA D 37 or Lanz D 7521?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the D 37 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- The HELA D 37 suits road haulage better on this data: 26% (4.1 km/h / 2.5 mph) more top speed.
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 | D 37 | D 7521 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 14.6 kW (19.6 hp)Traktorenlexikon, “HELA D37 (1937)” | 14.6 kW (19.6 hp)Traktorenlexikon, “Lanz D 7521/2” | Not comparableNot comparable on power at the PTO shaft: the D 37 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521 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 D 37 and the D 7521. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the D 37 and the D 7521. |
| Which pumps more oil for implements? | — | — | No figureNo call on hydraulic flow: no figure on record for the D 37 and the D 7521. |
| Which lifts more on the three-point hitch? | — | — | No figureNo call on three-point lift: no figure on record for the D 37 and the D 7521. |
| Which is heavier, for traction? | 1,600 kg (3,527 lb)Traktorenlexikon, “HELA D37 (1937)” | 3,050 kg (6,724 lb)Traktorenlexikon, “Lanz D 7521/2” | Ahead (a fact, not an advantage)The Lanz D 7521 is 91% heavier (1,450 kg / 3,197 lb) than the HELA D 37 (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 D 37 and the D 7521. |
| Which has the wider choice of gears? | 4Traktorenlexikon, “HELA D37 (1937)” | 6Traktorenlexikon, “Lanz D 7521/2” | AheadThe Lanz D 7521 has 50% more forward gears (2 gears) than the HELA D 37 (both forward gears, as stated by the source). |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the D 37 and the D 7521. |
| Which is faster on the road? | 20 km/h (12.4 mph)Traktorenlexikon, “HELA D37 (1937)” | 15.9 km/h (9.9 mph)Traktorenlexikon, “Lanz D 7521/2” | AheadThe HELA D 37 has 26% more top speed (4.1 km/h / 2.5 mph) than the Lanz D 7521 (both top speed forward, as stated by the source). |
| Which offers more PTO speeds? | 600Traktorenlexikon, “HELA D37 (1937)” | 760Traktorenlexikon, “Lanz D 7521/2” | No figureNo call on PTO speeds: no standard PTO speed stated for the D 37 and the D 7521. |
| Which PTO runs independently of the ground drive? | — | — | No figureNo call on PTO independence: not stated for the D 37 and the D 7521. |
| Which drives on both axles? | 2WDTraktorenlexikon, “HELA D37 (1937)” | 2WDTraktorenlexikon, “Lanz D 7521/2” | EvenEven on drive: all two-wheel drive. |
| Which is newer, and what about parts? | 1937 | 1934–1935 | 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 is 91% heavier (1,450 kg / 3,197 lb) than the HELA D 37 (both unladen weight, as stated by the source).
- The Lanz D 7521 has 50% more forward gears (2 gears) than the HELA D 37 (both forward gears, as stated by the source).
- The HELA D 37 has 26% more top speed (4.1 km/h / 2.5 mph) than the Lanz D 7521 (both top speed forward, as stated by the source).
- 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 D 37 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the D 7521 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