This page provides a detailed comparison of the specifications for the Allis-Chalmers Mfg. Co. 22-38 and the Hart-Parr 28-44.
| Allis-Chalmers Mfg. Co. 22-38 | Hart-Parr 28-44 | |
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | Hart-Parr |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Kerosene |
| Engine Induction Type | Naturally aspirated | Naturally aspirated |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 461 ci (7.5 L) | 443 ci (7.3 L) |
| Engine Rated Rpm | 940 | 1125 |
| Transmission | ||
| Transmission Type | Unsynchronized gear | Gear |
| Transmission Forward Gears | 2 | 3 |
| Transmission Reverse Gears | 1 | 1 |
| Dimensions | ||
| Length Value | 135 | 125.75 |
| Width Value | 66 | 65 |
| Operating Weight Value | 6640 lb (3012 kg) | 6415 lb (2910 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Category | - | 3 |
| Hitch Position | - | Rear |
| Operator Station Type | - | Open |
