8 material differences · fewer than 12
Tractor oneALLIS-CHALMERS D-171957–1967No measured PTO figureTractor twoDavid Brown 780 Selectamaric1967–1971No measured PTO figure
Which should you choose?
Read our verdict on the D-17 and the 780 Selectamaric → 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 · 2 fields identical or within 5%, which is not counted as material
| Field | D-17 | 780 Selectamaric | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 46.1 hp | 46.0 hp | — |
| Engine declared | ALLIS-CHALMERS G-226 | DAVID BROWN AD 3/55 | differs |
| Displacement declared | — | 2.70 L | — |
| Maximum torque declared | — | 110 lb·ft · 149 N·m | — |
| Transmission | |||
| Top speed declared | 12.4 mph · 20 km/h | 13.7 mph · 22 km/h | +10% 780 Selectamaric |
| Clutch declared | Foot-operated spring-loaded dry single-plate Rockford clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 10.5 gpm · 39.7 L/min | — | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,868 lb · 2,208 kg | 3,710 lb · 1,683 kg | +31% D-17 |
| Maximum permissible mass declared | — | 5,247 lb · 2,380 kg | — |
| Wheelbase declared | 93.0–95.7 in · 2,362–2,432 mm | 75.8 in · 1,926 mm | differs |
| Length declared | 140.0–143.0 in · 3,556–3,632 mm | 127.2 in · 3,230 mm | differs |
| Width declared | 76.7 in · 1,949 mm | 65.0 in · 1,650 mm | +18% D-17 |
| Ground clearance declared | 22.8 in · 580 mm | 12.8 in · 324 mm | +79% D-17 |
| Turning radius, braked declared | — | 10.2 ft · 3.10 m | — |
| Fuel tank declared | 75.9 qt · 71.8 L | 38.5 qt · 36.4 L | +97% D-17 |
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.
ALLIS-CHALMERS D-17 sources
- Source: Traktorenlexikon, “Allis-Chalmers D 17”
David Brown 780 Selectamaric sources
- Source: Traktorenlexikon, “David Brown 780”
- Source: Traktorenlexikon, “David Brown 1190”