Hermann Lanz D 634 or SOMECA 400 (DT)?
Which should you choose?
The data can’t decide this. Power at the PTO shaft cannot be compared: the D 634 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 400 (DT) has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft.
- The Hermann Lanz D 634 suits loader and hydraulic implement work better on this data: 42% (550 kg / 1,213 lb) more three-point lift.
- The SOMECA 400 (DT) suits heavy draft work (ploughing, cultivating) better on this data: four-wheel drive.
- The Hermann Lanz D 634 suits road haulage better on this data: 12% (3.1 km/h / 1.9 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 634 | 400 (DT) | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 24.9 kW (33.4 hp)Traktorenlexikon, “HELA D634” | 25 kW (34 hp)Traktorenlexikon, “Someca 400” | Not comparableNot comparable on power at the PTO shaft: the D 634 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 400 (DT) 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 634 and the 400 (DT). |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the D 634 and the 400 (DT). |
| Which pumps more oil for implements? | — | 21.8 L/min (5.8 gpm)Traktorenlexikon, “Someca 400” | No figureNo call on hydraulic flow: no figure on record for the D 634. |
| Which lifts more on the three-point hitch? | 1,850 kg (4,079 lb)Traktorenlexikon, “HELA D634” | 1,300 kg (2,866 lb)Traktorenlexikon, “Someca 400” | AheadThe Hermann Lanz D 634 has 42% more lift (550 kg / 1,213 lb) than the SOMECA 400 (DT) (both lift at the hitch ends, as stated by the source). |
| Which is heavier, for traction? | 1,780 kg (3,924 lb)Traktorenlexikon, “HELA D634” | 1,700 kg (3,748 lb)Traktorenlexikon, “Someca 400” | EvenEven on weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which may carry more ballast and load? | — | — | No figureNo call on maximum permissible mass: no figure on record for the D 634 and the 400 (DT). |
| Which has the wider choice of gears? | 8Traktorenlexikon, “HELA D634” | 6 to 9Traktorenlexikon, “Someca 400” | 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, “HELA D634” | — | No figureNo call on a creeper range: not stated for the 400 (DT). |
| Which is faster on the road? | 28.1 km/h (17.5 mph)Traktorenlexikon, “HELA D634” | 25 km/h (15.5 mph)Traktorenlexikon, “Someca 400” | AheadThe Hermann Lanz D 634 has 12% more top speed (3.1 km/h / 1.9 mph) than the SOMECA 400 (DT) (both top speed forward, as stated by the source). |
| Which offers more PTO speeds? | 580/1120 rpmTraktorenlexikon, “HELA D634” | 540 rpmTraktorenlexikon, “Someca 400” | No figureNo call on PTO speeds: no standard PTO speed stated for the D 634. |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “HELA D634” | — | No figureNo call on PTO independence: not stated for the 400 (DT). |
| Which drives on both axles? | 2WDTraktorenlexikon, “HELA D634” | Two-wheel or four-wheel driveTraktorenlexikon, “Someca 400” | AheadThe SOMECA 400 (DT) is available with four-wheel drive; the Hermann Lanz D 634 is two-wheel drive (as stated by the sources). |
| Which is newer, and what about parts? | 1974–1978 | 1968–1971 | Ahead (a fact, not an advantage)The Hermann Lanz D 634 is newer: production began 6 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The Hermann Lanz D 634 has 42% more lift (550 kg / 1,213 lb) than the SOMECA 400 (DT) (both lift at the hitch ends, as stated by the source).
- The Hermann Lanz D 634 has 12% more top speed (3.1 km/h / 1.9 mph) than the SOMECA 400 (DT) (both top speed forward, as stated by the source).
- The SOMECA 400 (DT) is available with four-wheel drive; the Hermann Lanz D 634 is two-wheel drive (as stated by the sources).
- The Hermann Lanz D 634 is newer: production began 6 years later. We hold no parts-availability data, so there is no call on parts.
- Even on weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, 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.
- Not comparable on power at the PTO shaft: the D 634 has only engine power (gross or net not stated), claimed — a different quantity from power at the shaft; the 400 (DT) 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, a creeper range, PTO speeds and PTO independence.
← Every figure for both machines, side by side, with sources