8 material differences · fewer than 12
Tractor oneDavid Brown 3800 Selectmatic1968–1971No measured PTO figureTractor twoPorsche-Diesel Super N3081957–1960No measured PTO figure
Which should you choose?
Read our verdict on the 3800 Selectmatic and the Super N308 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
8 material differences · 3 fields identical or within 5%, which is not counted as material
| Field | 3800 Selectmatic | Super N308 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 42.0 hp | 38 hp | +12% 3800 Selectmatic |
| Engine declared | — | Porsche-Diesel F 308 | — |
| Displacement declared | — | 2.47 L | — |
| Maximum torque declared | 115 lb·ft · 156 N·m | 100 lb·ft · 136 N·m | +15% 3800 Selectmatic |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 12.4 mph · 20 km/h | +25% 3800 Selectmatic |
| Clutch declared | Pedal-operated, dry and two-stage BORG & BECK double clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 8.5 gpm · 32.0 L/min | 4.0 gpm · 15 L/min | +113% 3800 Selectmatic |
| Rear PTO speeds declared | 540/1000 rpm | 540 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 3,351 lb · 1,520 kg | 3,560 lb · 1,615 kg | +6% Super N308 |
| Maximum permissible mass declared | — | 5,952 lb · 2,700 kg | — |
| Wheelbase declared | 75.8 in · 1,926 mm | 70.5–71.7 in · 1,790–1,820 mm | differs |
| Length declared | 116.0 in · 2,946 mm | 116.9 in · 2,970 mm | — |
| Width declared | 65.5 in · 1,664 mm | 62.8 in · 1,595 mm | — |
| Ground clearance declared | 17.5 in · 445 mm | 14.3 in · 364 mm | +22% 3800 Selectmatic |
| Turning radius, braked declared | 9.8 ft · 3.00 m | 10.0 ft · 3.05 m | — |
| Fuel tank declared | 38.5 qt · 36.4 L | 48.6 qt · 46 L | +26% Super N308 |
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.
David Brown 3800 Selectmatic sources
- Source: Traktorenlexikon, “David Brown 3800”
Porsche-Diesel Super N308 sources
- Source: Traktorenlexikon, “Porsche-Diesel Super N308”
- Source: Traktorenlexikon, “Porsche-Diesel Super B308”