This page provides a detailed comparison of the specifications for the Allis Chalmers HD21 and the CaseIH Farmall 90.
| Allis Chalmers HD21 | CaseIH Farmall 90 | |
|---|---|---|
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| Engine | ||
| Engine Manufacturer | Allis-Chalmers | Turk Tractor |
| Engine Model | - | FPT |
| Engine Cooling Type | Liquid-Cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Supercharged | Turbocharged and Intercooled |
| Engine Cylinders | 6 | 4 |
| Engine Displacement Value | 844 ci (13.8 L) | 274 ci (4.5 L) |
| Engine Rated Rpm | 1800 | 2300 |
| Engine Power Output Value | 225 hp (167.8 kW) | 84 hp (62.6 kW) |
| Transmission | ||
| Transmission Type | Torque Converter | 12-speed mechanical shuttle |
| Transmission Forward Gears | 2 | 12 |
| Transmission Reverse Gears | 1 | 12 |
| Dimensions | ||
| Length Value | 198 | - |
| Operating Weight Value | 45500 lb (20638 kg) | 5702 lb (2586 kg) |
| Miscellaneous | ||
| Chassis | - | 4x2 2WD |
| Drive Type | - | 2-Wheel Drive |
| Hydraulic System Type | - | Open Center |
| Starter Type | Electric | Electric Starter |
