This page provides a detailed comparison of the specifications for the Allis Chalmers D21 Series I and the Challenger 65C.
| Allis Chalmers D21 Series I | Challenger 65C | |
|---|---|---|
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | Caterpillar |
| Engine Model | 3400 | 3306 DITA |
| Engine Cooling Type | Liquid-cooled | Liquid |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Naturally aspirated | Turbocharged intercooled |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 426 ci (7.0 L) | 638 ci (10.5 L) |
| Engine Rated Rpm | 2200 | 2100 |
| Engine Power Output Value | 103 hp (76.8 kW) | 285 hp (212.5 kW) |
| Transmission | ||
| Transmission Type | Sliding gear with dry disc clutch | Full power shift |
| Transmission Forward Gears | 8 | 10 |
| Transmission Reverse Gears | 2 | 2 |
| Dimensions | ||
| Length Value | 160.6 | 232 |
| Width Value | 91.6 | 120 |
| Operating Weight Value | 9500 lb (4309 kg) | 32875 lb (14912 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | - |
| Drive Type | 2WD | - |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | - |
| Hitch Category | III/II | III/IV |
| Hitch Position | Rear | Rear |
| Hydraulic System Type | - | Closed center |
| Operator Station Type | Open | - |
| Starter Type | Electric | Electric |
