This page provides a detailed comparison of the specifications for the General Ordnance National Tractor 12-22 F and the Hart-Parr 20.
| General Ordnance National Tractor 12-22 F | Hart-Parr 20 | |
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| Engine | ||
| Engine Manufacturer | Waukesha | Hart-Parr |
| Engine Cooling Type | Liquid-cooled | - |
| Engine Fuel Type | Gasoline | Kerosene |
| Engine Induction Type | Naturally aspirated | Naturally Aspirated |
| Engine Cylinders | 4 | 2 |
| Engine Displacement Value | 326 ci (5.3 L) | 309 ci (5.1 L) |
| Engine Rated Rpm | - | 800 |
| Transmission | ||
| Transmission Type | Friction disc | Gear |
| Transmission Forward Gears | 6 | 2 |
| Transmission Reverse Gears | 6 | 1 |
| Dimensions | ||
| Length Value | 120 | - |
| Width Value | 61 | - |
| Operating Weight Value | 4200 lb (1905 kg) | 3990 lb (1810 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
