This page provides a detailed comparison of the specifications for the John Deere 8400 and the Valmet 6250.
| John Deere 8400 | 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 | Diesel | Diesel |
| Engine Induction Type | Turbocharged aftercooled | Turbocharged |
| Engine Cylinders | 6 | 4 |
| Engine Displacement Value | 496 ci (8.1 L) | 268 ci (4.4 L) |
| Engine Rated Rpm | 2200 | 2200 |
| Engine Power Output Value | 225 hp (167.8 kW) | 79 hp (59.0 kW) |
| Transmission | ||
| Transmission Type | Full power shift | Three-speed power shift |
| Transmission Forward Gears | 16 | 36 |
| Transmission Reverse Gears | 4 | 36 |
| Dimensions | ||
| Length Value | 206.3 | 176.2 |
| Width Value | - | 85.8 |
| Operating Weight Value | 19191 lb (8705 kg) | 9700 lb (4400 kg) |
| Miscellaneous | ||
| Chassis | 4x4 MFWD 4WD | 4x4 MFWD 4WD |
| Drive Type | MFWD 4WD | Four-wheel drive (4WD) |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | 3/3N | Category 2 |
| Hitch Category | Category 3 | II |
| Hitch Position | - | Rear |
| Hitch Capacity Value | 11710 lb (5312 kg) | - |
| Hydraulic System Type | Closed center pressure-flow compensated (PFC) | - |
| Operator Station Type | CommandView Cab | - |
| Starter Type | Electric | Electric |
