This page provides a detailed comparison of the specifications for the Allis Chalmers HD10 and the Hart-Parr Old Reliable 30-60.
| Allis Chalmers HD10 | Hart-Parr Old Reliable 30-60 | |
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| Engine | ||
| Engine Manufacturer | General Motors | Hart-Parr |
| Engine Cooling Type | Liquid-Cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Kerosene |
| Engine Induction Type | Blower | Natural |
| Engine Cylinders | 4 | 2 |
| Engine Displacement Value | 284 ci (4.7 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 1600 | 300 |
| Transmission | ||
| Transmission Type | Sliding Gear | Gear |
| Transmission Forward Gears | 6 | 1 |
| Transmission Reverse Gears | 2 | 1 |
| Dimensions | ||
| Length Value | 150 | 200 |
| Width Value | 94 | 106 |
| Operating Weight Value | 20380 lb (9244 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | Track | 4x2 |
| Drive Type | Tracked | 2WD |
| Starter Type | Electric | - |
