This page provides a detailed comparison of the specifications for the Allis Chalmers HD7 and the Caterpillar Twenty-Two.
| Allis Chalmers HD7 | Caterpillar Twenty-Two | |
|---|---|---|
| Images | ||
| Engine | ||
| Engine Manufacturer | General Motors | Caterpillar |
| Engine Model | Mar-71 | 4.1L 4-cyl |
| Engine Cooling Type | Liquid-cooled | - |
| Engine Fuel Type | Diesel | Gasoline |
| Engine Induction Type | Blower | - |
| Engine Cylinders | 3 | 4 |
| Engine Displacement Value | 213 ci (3.5 L) | 251 ci (4.1 L) |
| Engine Rated Rpm | 1500 | 1250 |
| Transmission | ||
| Transmission Type | Sliding Gear | Gear |
| Transmission Forward Gears | 4 | 3 |
| Transmission Reverse Gears | 1 | 1 |
| Dimensions | ||
| Length Value | 128 | 108 |
| Width Value | 81 | 57.75 |
| Operating Weight Value | 14000 lb (6350 kg) | 6200 lb (2812 kg) |
| Miscellaneous | ||
| Chassis | Crawler | - |
| Drive Type | Track | - |
| Starter Type | Electric | - |
