This page provides a detailed comparison of the specifications for the Challenger MT425B and the Massey Ferguson 491.
| Challenger MT425B | Massey Ferguson 491 | |
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| Engine | ||
| Engine Manufacturer | Perkins Diesel | Perkins |
| Engine Model | U0903BB5 | 1104C-44T |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | - | Turbocharged |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 268 ci (4.4 L) | 268 ci (4.4 L) |
| Engine Rated Rpm | 2200 | 2100 |
| Engine Power Output Value | 81 hp (60.5 kW) | 86 hp (64.0 kW) |
| Transmission | ||
| Transmission Type | Selective gear fixed ratio with partial (2) range operator-controlled power shift | Selective gear fixed ratio |
| Transmission Forward Gears | 16 | 12 |
| Transmission Reverse Gears | 16 | 4 |
| Dimensions | ||
| Length Value | - | 155 |
| Width Value | - | 80 |
| Operating Weight Value | 8695 lb (3944 kg) | 7610 lb (3452 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x4 4WD |
| Drive Type | 2WD | 4WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Category | II | II |
| Hitch Position | - | Rear |
| Hydraulic System Type | - | Open center |
| Operator Station Type | - | ROPS or Cab |
| Starter Type | Electric | 12 volts |
