This page provides a detailed comparison of the specifications for the CO-OP B3 and the Hart-Parr Old Reliable 30-60.
| CO-OP B3 | Hart-Parr Old Reliable 30-60 | |
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| Engine | ||
| Engine Manufacturer | Chrysler | Hart-Parr |
| Engine Cooling Type | - | Liquid-cooled |
| Engine Fuel Type | Gasoline | Kerosene |
| Engine Induction Type | - | Natural |
| Engine Cylinders | 6 | 2 |
| Engine Displacement Value | 242 ci (4.0 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | - | 300 |
| Transmission | ||
| Transmission Type | - | Gear |
| Transmission Forward Gears | - | 1 |
| Transmission Reverse Gears | - | 1 |
| Dimensions | ||
| Length Value | - | 200 |
| Width Value | - | 106 |
| Operating Weight Value | - | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x2 |
| Drive Type | 2WD | 2WD |
