8 material differences · fewer than 12
Tractor oneDavid Brown 850 Implematic1960–1965No measured PTO figureTractor twoVolvo T-251952–1959No measured PTO figure
Which should you choose?
We will not advise between these two machines, because they were not built in overlapping years (1960–1965; 1952–1959). The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.
Field by field
8 material differences · 4 fields identical or within 5%, which is not counted as material
| Field | 850 Implematic | T-25 | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 35.0 hp | 30.6 hp | +14% 850 Implematic |
| Engine declared | DAVID BROWN AD 4/36 A-106 | VOLVO CB-22 | differs |
| Displacement declared | 2.52 L | 2.15 L | +18% 850 Implematic |
| Maximum torque declared | 110 lb·ft · 149 N·m | — | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 12.4 mph · 20 km/h | +25% 850 Implematic |
| Clutch declared | Pedal-operated dry BORG & BECK single-plate clutch type 10 inch | Pedal operated dry BORG & BECK single plate clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 6.0 gpm · 22.7 L/min | 6.3 gpm · 23.8 L/min | — |
| Pressure declared | — | 1,276 psi · 88 bar | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 3,704 lb · 1,680 kg | 3,459 lb · 1,569 kg | +7% 850 Implematic |
| Wheelbase declared | 75.2 in · 1,911 mm | 69.7 in · 1,770 mm | +8% 850 Implematic |
| Length declared | 114.0 in · 2,896 mm | 116.1 in · 2,950 mm | — |
| Width declared | 62.8 in · 1,594 mm | 64.6 in · 1,640 mm | — |
| Ground clearance declared | 15.5 in · 394 mm | 16.5 in · 420 mm | +7% T-25 |
| Turning radius, braked declared | 7.9 ft · 2.41 m | — | — |
| Fuel tank declared | 42.1 qt · 39.8 L | 47.6 qt · 45.0 L | +13% T-25 |
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 850 Implematic sources
- Source: Traktorenlexikon, “David Brown 850”
Volvo T-25 sources
- Source: Traktorenlexikon, “Volvo T 25”