This page provides a detailed comparison of the specifications for the Allis Chalmers HD21 and the John Deere 7700.
| Allis Chalmers HD21 | John Deere 7700 | |
|---|---|---|
| Images | ||
| Engine | ||
| Engine Manufacturer | Allis-Chalmers | John Deere |
| Engine Model | - | John Deere |
| Engine Cooling Type | Liquid-Cooled | Liquid |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Supercharged | Turbocharged |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 844 ci (13.8 L) | 466 ci (7.6 L) |
| Engine Rated Rpm | 1800 | 2100 |
| Engine Power Output Value | 225 hp (167.8 kW) | 150 hp (111.9 kW) |
| Transmission | ||
| Transmission Type | Torque Converter | Partial Power Shift |
| Transmission Forward Gears | 2 | 16 |
| Transmission Reverse Gears | 1 | 12 |
| Dimensions | ||
| Length Value | 198 | 187.2 |
| Operating Weight Value | 45500 lb (20638 kg) | 13870 lb (6291 kg) |
| Miscellaneous | ||
| Chassis | - | 4x2 2WD |
| Drive Type | - | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | - | Three-point hitch |
| Hitch Category | - | IIIN/II |
| Hitch Capacity Value | - | 8930 lb (4051 kg) |
| Hydraulic System Type | - | Open center |
| Operator Station Type | - | ComfortGard cab (standard) with air-conditioning |
| Starter Type | Electric | Electric |
