10 material differences · fewer than 12
Tractor oneDavid Brown 1390 (A)1980–1984No measured PTO figureTractor twoLamborghini R 684 (DT)1982–1985No measured PTO figure
Which should you choose?
Read our verdict on the 1390 (A) and the R 684 (DT) → 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 | 1390 (A) | R 684 (DT) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 66.1 hp | 66.1 hp | — |
| Engine declared | DAVID BROWN AD 4/55 | SAME 984-P | differs |
| Displacement declared | 3.20 L | 3.62 L | +13% R 684 (DT) |
| Maximum torque declared | 168 lb·ft · 228 N·m | 181 lb·ft · 245 N·m | +7% R 684 (DT) |
| Transmission | |||
| Top speed declared | 18.6 mph · 30 km/h | 18.6 mph · 30 km/h | — |
| Clutch declared | Dry Borg & Beck double clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 8.7 gpm · 32.9 L/min | 7.9 gpm · 30.0 L/min | +10% 1390 (A) |
| Rear PTO speeds declared | 540 rpm / 1000 rpm | 540/1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 6,363 lb · 2,886 kg | 5,842 lb · 2,650 kg | +9% 1390 (A) |
| Wheelbase declared | 83.0 in · 2,108 mm | 89.2 in · 2,265 mm | +7% R 684 (DT) |
| Length declared | 142.9 in · 3,630 mm | 139.4 in · 3,540 mm | — |
| Width declared | 72.8–100.8 in · 1,850–2,560 mm | 69.7–93.3 in · 1,770–2,370 mm | differs |
| Ground clearance declared | 15.0 in · 381 mm | 19.7 in · 500 mm | +31% R 684 (DT) |
| Turning radius, braked declared | 10.5 ft · 3.20 m | — | — |
| Fuel tank declared | 99.3 qt · 94.0 L | 68.7 qt · 65.0 L | +45% 1390 (A) |
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 1390 (A) sources
- Source: Traktorenlexikon, “David Brown 1390”
- Source: Traktorenlexikon, “Case 1390”
Lamborghini R 684 (DT) sources
- Source: Traktorenlexikon, “Lamborghini 684 DT”
- Source: Traktorenlexikon, “Lamborghini 654 DT”