This page provides a detailed comparison of the specifications for the Allis Chalmers HD21 and the Caterpillar Twenty-Two.
| Allis Chalmers HD21 | Caterpillar Twenty-Two | |
|---|---|---|
| Images | ||
| Engine | ||
| Engine Manufacturer | Allis-Chalmers | Caterpillar |
| Engine Model | - | 4.1L 4-cyl |
| Engine Cooling Type | Liquid-Cooled | - |
| Engine Fuel Type | Diesel | Gasoline |
| Engine Induction Type | Supercharged | - |
| Engine Cylinders | 6 | 4 |
| Engine Displacement Value | 844 ci (13.8 L) | 251 ci (4.1 L) |
| Engine Rated Rpm | 1800 | 1250 |
| Engine Power Output Value | 225 hp (167.8 kW) | - |
| Transmission | ||
| Transmission Type | Torque Converter | Gear |
| Transmission Forward Gears | 2 | 3 |
| Transmission Reverse Gears | 1 | 1 |
| Dimensions | ||
| Length Value | 198 | 108 |
| Width Value | - | 57.75 |
| Operating Weight Value | 45500 lb (20638 kg) | 6200 lb (2812 kg) |
| Miscellaneous | ||
| Starter Type | Electric | - |
