This page provides a detailed comparison of the specifications for the Allis Chalmers D21 Series II and the John Deere 8230.
| Allis Chalmers D21 Series II | John Deere 8230 | |
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | John Deere |
| Engine Model | 3500 | 2240 |
| Engine Cooling Type | Liquid-cooled | - |
| Engine Fuel Type | Diesel | - |
| Engine Induction Type | Naturally aspirated | Turbocharged |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 426 ci (7.0 L) | 549 ci (9.0 L) |
| Engine Rated Rpm | 2200 | 2100 |
| Engine Power Output Value | 121 hp (90.2 kW) | 245 hp (182.7 kW) |
| Transmission | ||
| Transmission Type | Sliding gear with dry disc clutch | Powershift |
| Transmission Forward Gears | 8 | 16 |
| Transmission Reverse Gears | 2 | 4 |
| Dimensions | ||
| Length Value | 160.2 | - |
| Width Value | 91.3 | - |
| Operating Weight Value | 9502 lb (4310 kg) | - |
| Miscellaneous | ||
| Chassis | 4x2 2WD | - |
| Drive Type | 2WD | - |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | Three-Point Hitch |
| Hitch Category | III/II | Category 3 |
| Hitch Position | Rear | Rear |
| Hitch Capacity Value | - | 12401 lb (5625 kg) |
| Operator Station Type | Open | - |
| Starter Type | Electric | - |
