Fahr D 90 or Güldner AF 15?
Which should you choose?
On performance, every comparable figure that differs favours the Fahr D 90: maximum permissible mass. On features, the Güldner AF 15 is ahead on 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 90 | AF 15 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 8.8 kW (12 hp)Traktorenlexikon, “Fahr D 90” | 9.6 kW (13 hp)Traktorenlexikon, “Güldner AF 15” | EvenEven on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, too small to call. |
| 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 90 and the AF 15. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the D 90 and the AF 15. |
| Which pumps more oil for implements? | — | — | No figureNo call on hydraulic flow: no figure on record for the D 90 and the AF 15. |
| Which lifts more on the three-point hitch? | 690 kg (1,521 lb)Traktorenlexikon, “Fahr D 90” | — | No figureNo call on three-point lift: no figure on record for the AF 15. |
| Which is heavier, for traction? | 1,050 kg (2,315 lb)Traktorenlexikon, “Fahr D 90” | 1,225 kg (2,701 lb)Traktorenlexikon, “Güldner AF 15” | Ahead (a fact, not an advantage)The Güldner AF 15 is 17% heavier (175 kg / 386 lb) than the Fahr D 90 (both unladen weight, as stated by the source). |
| Which may carry more ballast and load? | 1,680 kg (3,704 lb)Traktorenlexikon, “Fahr D 90” | 1,500 kg (3,307 lb)Traktorenlexikon, “Güldner AF 15” | AheadThe Fahr D 90 has 12% higher maximum permissible mass (180 kg / 397 lb) than the Güldner AF 15 (both maximum permissible mass, as stated by the source). |
| Which has the wider choice of gears? | 5 to 10Traktorenlexikon, “Fahr D 90” | 5Traktorenlexikon, “Güldner AF 15” | 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? | — | — | No figureNo call on a creeper range: not stated for the D 90 and the AF 15. |
| Which is faster on the road? | 17.8 km/h (11.1 mph)Traktorenlexikon, “Fahr D 90” | 20 km/h (12.4 mph)Traktorenlexikon, “Güldner AF 15” | AheadThe Güldner AF 15 has 12% more top speed (2.2 km/h / 1.4 mph) than the Fahr D 90 (both top speed forward, as stated by the source). |
| Which offers more PTO speeds? | 588 rpmTraktorenlexikon, “Fahr D 90” | 540 rpmTraktorenlexikon, “Güldner AF 15” | No figureNo call on PTO speeds: no standard PTO speed stated for the D 90. |
| Which PTO runs independently of the ground drive? | — | dependent (stops with the clutch)Traktorenlexikon, “Güldner AF 15” | No figureNo call on PTO independence: not stated for the D 90. |
| Which drives on both axles? | 2WDTraktorenlexikon, “Fahr D 90” | 2WDTraktorenlexikon, “Güldner AF 15” | EvenEven on drive: all two-wheel drive. |
| Which is newer, and what about parts? | 1953–1956 | 1949–1954 | 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 Güldner AF 15 is 17% heavier (175 kg / 386 lb) than the Fahr D 90 (both unladen weight, as stated by the source).
- The Fahr D 90 has 12% higher maximum permissible mass (180 kg / 397 lb) than the Güldner AF 15 (both maximum permissible mass, as stated by the source).
- The Güldner AF 15 has 12% more top speed (2.2 km/h / 1.4 mph) than the Fahr D 90 (both top speed forward, as stated by the source).
- Even on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, 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.
- 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.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, hydraulic flow, three-point lift, a creeper range, PTO speeds and PTO independence.
← Every figure for both machines, side by side, with sources