This page provides a detailed comparison of the specifications for the Challenger MT851 and the Hart-Parr Old Reliable 30-60.
| Challenger MT851 | Hart-Parr Old Reliable 30-60 | |
|---|---|---|
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| Engine | ||
| Engine Manufacturer | MAN | Hart-Parr |
| Engine Model | D3876 | - |
| Engine Cooling Type | Liquid | Liquid-cooled |
| Engine Fuel Type | Diesel | Kerosene |
| Engine Induction Type | Turbocharged | Natural |
| Engine Cylinders | 6 | 2 |
| Engine Displacement Value | 934 ci (15.3 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 1730 | 300 |
| Engine Power Output Value | 504 hp (376.0 kW) | - |
| Transmission | ||
| Transmission Type | Continuously-Variable Transmission | Gear |
| Transmission Forward Gears | Infinite | 1 |
| Transmission Reverse Gears | Infinite | 1 |
| Dimensions | ||
| Length Value | 266 | 200 |
| Width Value | 116.1 | 106 |
| Operating Weight Value | 42000 lb (19051 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | Crawler | 4x2 |
| Drive Type | - | 2WD |
| Hydraulic System Type | Closed Center Pressure-Flow Compensated | - |
| Starter Type | Electric | - |
