This page provides a detailed comparison of the specifications for the Avery 25-50 and the Hart-Parr Old Reliable 30-60.
| Avery 25-50 | Hart-Parr Old Reliable 30-60 | |
|---|---|---|
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| Engine | ||
| Engine Manufacturer | Avery | Hart-Parr |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Kerosene |
| Engine Induction Type | - | Natural |
| Engine Cylinders | 4 | 2 |
| Engine Displacement Value | 1062 ci (17.4 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 700 | 300 |
| Transmission | ||
| Transmission Type | Unsynchronized gear | Gear |
| Transmission Forward Gears | 2 | 1 |
| Transmission Reverse Gears | 1 | 1 |
| Dimensions | ||
| Length Value | 176 | 200 |
| Width Value | 90.5 | 106 |
| Operating Weight Value | 12500 lb (5670 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
