11 material differences · fewer than 12
Tractor oneBUKH 403 (Super)1963–1967No measured PTO figureTractor twoPorsche-Diesel S 3091961–1963No measured PTO figure
Which should you choose?
Read our verdict on the 403 (Super) and the S 309 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
11 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 403 (Super) | S 309 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 39.4 hp | 39.6 hp | — |
| Engine declared | BUKH 3 G 105 | Porsche-Diesel F 309 | differs |
| Displacement declared | 3.38 L | 2.63 L | +29% 403 (Super) |
| Maximum torque declared | — | 102 lb·ft · 138 N·m | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 14.7 mph · 23.6 km/h | +6% 403 (Super) |
| Clutch declared | — | Single-disc dry clutch with oil-hydraulic Voith fluid coupling | — |
| Hydraulics & hitch | |||
| Pump flow declared | 4.2 gpm · 16.0 L/min | 4.0 gpm · 15.0 L/min | +7% 403 (Super) |
| Pressure declared | 1,987 psi · 137 bar | — | — |
| Rear PTO speeds declared | 540 rpm / 1000 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 4,112 lb · 1,865 kg | 3,197 lb · 1,450 kg | +29% 403 (Super) |
| Wheelbase declared | 83.3 in · 2,115 mm | 69.7 in · 1,770 mm | +19% 403 (Super) |
| Length declared | 124.6 in · 3,165 mm | 111.8 in · 2,840 mm | +11% 403 (Super) |
| Width declared | 64.2 in · 1,630 mm | 46.1 in · 1,170 mm | +39% 403 (Super) |
| Ground clearance declared | 15.7 in · 400 mm | 14.2 in · 360 mm | +11% 403 (Super) |
| Turning radius, braked declared | 8.9 ft · 2.70 m | — | — |
| Fuel tank declared | 37.0 qt · 35.0 L | 42.3 qt · 40 L | +14% S 309 |
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.
BUKH 403 (Super) sources
- Source: Traktorenlexikon, “Bukh Super 403”
Porsche-Diesel S 309 sources
- Source: Traktorenlexikon, “Porsche-Diesel Super S309”