10 material differences · fewer than 12
Tractor oneFahr D 121952–1953No measured PTO figureTractor twoGüldner AF 151949–1954No measured PTO figure
Which should you choose?
Read our verdict on the D 12 and the AF 15 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
10 material differences · 3 fields identical or within 5%, which is not counted as material
| Field | D 12 | AF 15 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 11.8 hp | 16.6 hp | +41% AF 15 |
| Engine declared | Güldner 1 DA | Güldner 2 D 15 | differs |
| Displacement declared | 0.82 L | 1.30 L | +60% AF 15 |
| Maximum torque declared | 33 lb·ft · 45 N·m | 54 lb·ft · 74 N·m | +64% AF 15 |
| Transmission | |||
| Top speed declared | 11.7 mph · 18.9 km/h | 12.4 mph · 20 km/h | +6% AF 15 |
| Clutch declared | Pedal operated dry Fichtel & Sachs single disc clutch | Pedal operated dry single-plate clutch from Fichtel & Sachs type K-12 Z | differs |
| Hydraulics & hitch | |||
| Pressure declared | 3,129 psi · 216 bar | — | — |
| Rear PTO speeds declared | 600 | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 2,535 lb · 1,150 kg | 2,701 lb · 1,225 kg | +7% AF 15 |
| Maximum permissible mass declared | 3,638 lb · 1,650 kg | 3,307 lb · 1,500 kg | +10% D 12 |
| Wheelbase declared | 60.6 in · 1,540 mm | 61.0 in · 1,550 mm | — |
| Length declared | 97.2 in · 2,470 mm | 104.3 in · 2,650 mm | +7% AF 15 |
| Width declared | 61.5 in · 1,562 mm | 62.1 in · 1,578 mm | — |
| Ground clearance declared | 15.4 in · 390 mm | 15.7 in · 400 mm | — |
| Turning radius, braked declared | 6.9 ft · 2.10 m | — | — |
| Fuel tank declared | 26.4 qt · 25 L | 21.1 qt · 20 L | +25% D 12 |
Height is not in this table. It is not one measurement: the sources measure it to different points — over the cab on some machines, over the steering wheel or the exhaust on others — and the same tractor measured two ways can differ by most of a metre. It appears here only when both machines' figures carry the point they were measured to and it is the same point, which is not the case for these two. Each machine's own page prints its height as its source gives it.
Fahr D 12 sources
- Source: Traktorenlexikon, “Fahr D 12”
Güldner AF 15 sources
- Source: Traktorenlexikon, “Güldner AF 15”
- Source: Traktorenlexikon, “Fahr D 17”