This page provides a detailed comparison of the specifications for the RK Tractors RK55 and the Valmet 6250.
| RK Tractors RK55 | Valmet 6250 | |
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| Engine | ||
| Engine Manufacturer | Yanmar | Valmet |
| Engine Model | 4TNV86T-CR | 420 DSRE |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Turbocharged | Turbocharged |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 128 ci (2.1 L) | 268 ci (4.4 L) |
| Engine Rated Rpm | 2800 | 2200 |
| Engine Power Output Value | 55 hp (41.0 kW) | 79 hp (59.0 kW) |
| Transmission | ||
| Transmission Type | - | Three-speed power shift |
| Transmission Forward Gears | 16 | 36 |
| Transmission Reverse Gears | 16 | 36 |
| Dimensions | ||
| Length Value | 140.9 | 176.2 |
| Width Value | 63.8 | 85.8 |
| Operating Weight Value | - | 9700 lb (4400 kg) |
| Miscellaneous | ||
| Chassis | 4x4 MFWD 4WD | 4x4 MFWD 4WD |
| Drive Type | 4WD | Four-wheel drive (4WD) |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | - | Category 2 |
| Hitch Category | I | II |
| Hitch Position | - | Rear |
| Hitch Capacity Value | 3310 lb (1501 kg) | - |
| Operator Station Type | Two-post ROPS | - |
| Starter Type | Electric | Electric |
