This page provides a detailed comparison of the specifications for the Hart-Parr 28-50 and the Minneapolis Threshing Machine Company 20-40.
| Hart-Parr 28-50 | Minneapolis Threshing Machine Company 20-40 | |
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| Engine | ||
| Engine Manufacturer | Hart-Parr | Minneapolis |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Gasoline | Kerosene |
| Engine Induction Type | Naturally aspirated | Naturally aspirated |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 675 ci (11.1 L) | 727 ci (11.9 L) |
| Engine Rated Rpm | 850 | 650 |
| Transmission | ||
| Transmission Type | Gear | Gear |
| Transmission Forward Gears | 2 | 2 |
| Transmission Reverse Gears | 1 | 1 |
| Dimensions | ||
| Length Value | - | 167 |
| Width Value | - | 96 |
| Operating Weight Value | 10394 lb (4715 kg) | 12000 lb (5443 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x2 2WD |
| Drive Type | 2WD | 2WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Starter Type | - | Hand crank |
