This page provides a detailed comparison of the specifications for the Hart-Parr Old Reliable 30-60 and the Zetor 4321.
| Hart-Parr Old Reliable 30-60 | Zetor 4321 | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | Zetor |
| Engine Model | - | Z6202 |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Kerosene | Diesel |
| Engine Induction Type | Natural | Natural |
| Engine Cylinders | 2 | 4 |
| Engine Displacement Value | 2356 ci (38.6 L) | 239 ci (3.9 L) |
| Engine Rated Rpm | 300 | 2200 |
| Engine Power Output Value | - | 59 hp (44.0 kW) |
| Transmission | ||
| Transmission Type | Gear | Mechanical Shuttle |
| Transmission Forward Gears | 1 | 10 |
| Transmission Reverse Gears | 1 | 2 |
| Dimensions | ||
| Length Value | 200 | 140.9 |
| Width Value | 106 | 72.8 |
| Operating Weight Value | 20100 lb (9117 kg) | 6620 lb (3003 kg) |
| Miscellaneous | ||
| Chassis | 4x2 | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | - | Three-Point Hitch |
| Hitch Category | - | II/I |
| Hitch Position | - | Rear |
| Hitch Capacity Value | - | 6835 lb (3100 kg) |
| Hydraulic System Type | - | Open center |
| Operator Station Type | - | Two-post folding ROPS or Cab (optional with air-conditioning) |
| Starter Type | - | Electric |
