This page provides a detailed comparison of the specifications for the Ford 8770 and the Hart-Parr Old Reliable 30-60.
| Ford 8770 | Hart-Parr Old Reliable 30-60 | |
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| Engine | ||
| Engine Manufacturer | Ford | Hart-Parr |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Kerosene |
| Engine Induction Type | Turbocharged | Natural |
| Engine Cylinders | 6 | 2 |
| Engine Displacement Value | 456 ci (7.5 L) | 2356 ci (38.6 L) |
| Engine Rated Rpm | 2100 | 300 |
| Engine Power Output Value | 190 hp (141.7 kW) | - |
| Transmission | ||
| Transmission Type | Full power shift, Creep | Gear |
| Transmission Forward Gears | 32 | 1 |
| Transmission Reverse Gears | 18 | 1 |
| Dimensions | ||
| Length Value | 196.7 | 200 |
| Width Value | 96.7 | 106 |
| Operating Weight Value | 16600 lb (7530 kg) | 20100 lb (9117 kg) |
| Miscellaneous | ||
| Chassis | - | 4x2 |
| Drive Type | - | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-point hitch | - |
| Hitch Category | III | - |
| Hitch Position | Rear | - |
| Hitch Capacity Value | 31500 lb (14288 kg) | - |
| Hydraulic System Type | Closed center load sensing | - |
| Operator Station Type | Cab | - |
| Starter Type | Electric | - |
