This page provides a detailed comparison of the specifications for the John Deere 2640 (1976-1979) and the Valmet 6250.
| John Deere 2640 (1976-1979) | Valmet 6250 | |
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| Engine | ||
| Engine Manufacturer | John Deere | Valmet |
| Engine Model | - | 420 DSRE |
| Engine Cooling Type | Liquid | Liquid-cooled |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Natural Aspiration | Turbocharged |
| Engine Cylinders | 4 | 4 |
| Engine Displacement Value | 276 ci (4.5 L) | 268 ci (4.4 L) |
| Engine Rated Rpm | 2500 | 2200 |
| Engine Power Output Value | 70 hp (52.2 kW) | 79 hp (59.0 kW) |
| Transmission | ||
| Transmission Type | Collar Shift | Three-speed power shift |
| Transmission Forward Gears | 16 | 36 |
| Transmission Reverse Gears | 8 | 36 |
| Dimensions | ||
| Length Value | 139.4 | 176.2 |
| Width Value | 69.3 | 85.8 |
| Operating Weight Value | 5798 lb (2630 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/I | II |
| Hitch Position | Rear | Rear |
| Hydraulic System Type | Closed Center | - |
| Operator Station Type | Open | - |
| Starter Type | Electric | Electric |
