This page provides a detailed comparison of the specifications for the David Brown 900 and the Massey Ferguson 550.
| David Brown 900 | Massey Ferguson 550 | |
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| Engine | ||
| Engine Manufacturer | David Brown | Perkins |
| Engine Model | AD4/30H | AD3.152S |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Naturally aspirated | Naturally aspirated |
| Engine Cylinders | 4 | 3 |
| Engine Displacement Value | 165 ci (2.7 L) | 153 ci (2.5 L) |
| Engine Rated Rpm | 2200 | 2250 |
| Engine Power Output Value | 38 hp (28.0 kW) | 47 hp (35.0 kW) |
| Transmission | ||
| Transmission Type | Gear type | Gear |
| Transmission Forward Gears | 6 | 8 |
| Transmission Reverse Gears | 2 | 2 |
| Dimensions | ||
| Length Value | 113 | 139.8 |
| Width Value | 65 | 65 |
| Operating Weight Value | 4000 lb (1814 kg) | 4586 lb (2080 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Category | I | II |
| Hitch Position | - | Rear |
| Hitch Capacity Value | 1800 lb (816 kg) | 3120 lb (1415 kg) |
| Operator Station Type | Open operator station | Cab standard with heater (ROPS available) |
| Starter Type | Electric | Electric |
