This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the Versatile 535.
| Hart-Parr Old Reliable 30-60 | Versatile 535 | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | Cummins |
| Engine Model | - | QSX15 |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Turbocharged and air-to-air aftercooled |
| Engine Cylinders | 2 | 6 |
| Engine Displacement Value | 2356 ci (38.6 L) | 912 ci (14.9 L) |
| Engine Rated Rpm | 300 | - |
| Engine Power Output Value | - | 535 hp (398.9 kW) |
| Transmission | ||
| Transmission Type | Gear | Partly synchronized / Full power shift |
| Transmission Forward Gears | 1 | 16 |
| Transmission Reverse Gears | 1 | 4 |
| Dimensions | ||
| Length Value | 200 | 299 |
| Width Value | 106 | - |
| Operating Weight Value | 20100 lb (9117 kg) | 42000 lb (19051 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x4 articulated 4WD |
| Drive Type | 2WD | 4WD |
| Hydraulic System Type | - | Closed center load sensing (CCLS) |
| Operator Station Type | - | Cab |
| Starter Type | - | Electric |
