This page provides a detailed comparison of the specifications for the Allis Chalmers 7000 and the Challenger MT655D.
| Allis Chalmers 7000 | Challenger MT655D | |
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | Sisu Diesel |
| Engine Model | 2900 | AGCO Power |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled with engine coolant heat exchanger for crankcase oil, radiator for hydraulic and transmission oil |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Turbocharged | Turbocharged air-to-air intercooled |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 301 ci (4.9 L) | 514 ci (8.4 L) |
| Engine Rated Rpm | 2200 | 1950 |
| Engine Power Output Value | 117 hp (87.2 kW) | 277 hp (206.3 kW) |
| Transmission | ||
| Transmission Type | Partial power shift | Techstar CVT continuously variable transmission |
| Transmission Forward Gears | 12 | Infinite |
| Transmission Reverse Gears | 3 | Infinite |
| Dimensions | ||
| Length Value | 183 | 215.7 |
| Operating Weight Value | 9550 lb (4332 kg) | 25365 lb (11505 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x4 |
| Drive Type | 2WD | 4WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | - |
| Hitch Category | II | III |
| Hitch Position | Rear | - |
| Hitch Capacity Value | - | 17850 lb (8097 kg) |
| Hydraulic System Type | Open center | Closed center load sensing (CCLS) |
| Operator Station Type | Cab (Acousta-Cab optional or Acousta-Cab II from 1978) | Cab |
| Starter Type | Electric Starter | Electric |
