This page provides a detailed comparison of the specifications for the Allis Chalmers 7000 and the Challenger MT645C.
| Allis Chalmers 7000 | Challenger MT645C | |
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| Engine | ||
| Engine Manufacturer | Allis Chalmers | AGCO |
| Engine Model | 2900 | Sisu Diesel (Serial No. T00767) |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Turbocharged | Turbocharged intercooled |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 301 ci (4.9 L) | 513 ci (8.4 L) |
| Engine Rated Rpm | 2200 | 2200 |
| Engine Power Output Value | 117 hp (87.2 kW) | 242 hp (180.7 kW) |
| Transmission | ||
| Transmission Type | Partial power shift | Continuously variable transmission |
| Transmission Forward Gears | 12 | Infinite |
| Transmission Reverse Gears | 3 | Infinite |
| Dimensions | ||
| Length Value | 183 | 223.2 |
| Operating Weight Value | 9550 lb (4332 kg) | 25795 lb (11700 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | - |
| Drive Type | 2WD | - |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | Three-Point Hitch |
| Hitch Category | II | III |
| Hitch Position | Rear | Rear |
| Hitch Capacity Value | - | 26460 lb (12002 kg) |
| Hydraulic System Type | Open center | Closed center load sensing |
| Operator Station Type | Cab (Acousta-Cab optional or Acousta-Cab II from 1978) | - |
| Starter Type | Electric Starter | Electric |
