This page provides a detailed comparison of the specifications for the Challenger MT255 and the Hart-Parr Old Reliable 30-60.
| Challenger MT255 | Hart-Parr Old Reliable 30-60 | |
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| Engine | ||
| Engine Manufacturer | Iseki | Hart-Parr |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Kerosene |
| Engine Induction Type | Natural | Natural |
| Engine Cylinders | 3 | 2 |
| Engine Displacement Value | 89 ci (1.5 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 2500 | 300 |
| Engine Power Output Value | 28 hp (21.2 kW) | - |
| Transmission | ||
| Transmission Type | Constant mesh | Gear |
| Transmission Forward Gears | 9 | 1 |
| Transmission Reverse Gears | 3 | 1 |
| Dimensions | ||
| Length Value | 116.5 | 200 |
| Width Value | 51 | 106 |
| Operating Weight Value | 2248 lb (1020 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | 4x4 MFWD 4WD | 4x2 |
| Drive Type | 4WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | CAT I | - |
| Hitch Category | I | - |
| Hitch Position | Rear | - |
| Hitch Capacity Value | 1323 lb (600 kg) | - |
| Hydraulic System Type | Open Center | - |
| Operator Station Type | Open, ROPS | - |
| Starter Type | Electric | - |
