This page provides a detailed comparison of the specifications for the John Deere 4420 and the Valmet 6250.
| John Deere 4420 | Valmet 6250 | |
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| Engine | ||
| Engine Manufacturer | John Deere | Valmet |
| Engine Model | John Deere | 420 DSRE |
| Engine Cooling Type | Liquid-cooled | Liquid-cooled |
| Engine Fuel Type | Gasoline | Diesel |
| Engine Induction Type | Natural aspiration | Turbocharged |
| Engine Cylinders | 6 | 4 |
| Engine Displacement Value | 329 ci (5.4 L) | 268 ci (4.4 L) |
| Engine Rated Rpm | 2500 | 2200 |
| Engine Power Output Value | 102 hp (76.1 kW) | 79 hp (59.0 kW) |
| Transmission | ||
| Transmission Type | Syncro-Range | Three-speed power shift |
| Transmission Forward Gears | 8 | 36 |
| Transmission Reverse Gears | 2 | 36 |
| Dimensions | ||
| Length Value | 168.1 | 176.2 |
| Width Value | - | 85.8 |
| Operating Weight Value | 8283 lb (3757 kg) | 9700 lb (4400 kg) |
| Miscellaneous | ||
| Chassis | 4x2 2WD | 4x4 MFWD 4WD |
| Drive Type | 2WD | Four-wheel drive (4WD) |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-point hitch | Category 2 |
| Hitch Category | II | II |
| Hitch Position | Rear | Rear |
| Hydraulic System Type | Closed center | - |
| Operator Station Type | Open | - |
| Starter Type | Electric | Electric |
