13 material differences
Tractor oneDavid Brown 996 (A)1971–1976No measured PTO figureTractor twoIMT 577 (DV)1981–1993No measured PTO figure
Which should you choose?
Read our verdict on the 996 (A) and the 577 (DV) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
13 material differences · 1 fields identical or within 5%, which is not counted as material
| Field | 996 (A) | 577 (DV) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 63.2 hp | 69.1 hp | +9% 577 (DV) |
| Engine declared | DAVID BROWN AD 4/55051 | IMR-PERKINS S-44 A/T (A 4.248) | differs |
| Displacement declared | 3.59 L | 4.07 L | +13% 577 (DV) |
| Maximum torque declared | 164 lb·ft · 222 N·m | 194 lb·ft · 263 N·m | +18% 577 (DV) |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 18.6 mph · 30 km/h | +20% 577 (DV) |
| Clutch declared | Dry double clutch, type 11"/11" | Pedal operated dry two stage KRON NOVI double clutch | differs |
| Hydraulics & hitch | |||
| Pump flow declared | 7.4 gpm · 28.2 L/min | 5.9 gpm · 22.3 L/min | +26% 996 (A) |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 5,754 lb · 2,610 kg | 6,482 lb · 2,940 kg | +13% 577 (DV) |
| Wheelbase declared | 82.0 in · 2,083 mm | 87.2 in · 2,215 mm | +6% 577 (DV) |
| Length declared | 130.0 in · 3,302 mm | 144.5 in · 3,670 mm | +11% 577 (DV) |
| Width declared | 67.0 in · 1,702 mm | 68.9–87.4 in · 1,750–2,220 mm | differs |
| Ground clearance declared | 20.9 in · 530 mm | 18.9 in · 480 mm | +10% 996 (A) |
| Turning radius, braked declared | 10.8 ft · 3.28 m | 14.1 ft · 4.29 m | +31% 577 (DV) |
| Fuel tank declared | 72.3 qt · 68.4 L | 95.1 qt · 90.0 L | +32% 577 (DV) |
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 996 (A) sources
Source
- Source: Traktorenlexikon, “David Brown 996”
IMT 577 (DV) sources
Source
- Source: Traktorenlexikon, “IMT 577”