This page provides a detailed comparison of the specifications for the John Deere 8640 and the John Deere 8650.
| John Deere 8640 | John Deere 8650 | |
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| Engine | ||
| Engine Manufacturer | John Deere | John Deere |
| Engine Cooling Type | Liquid-cooled | Liquid |
| Engine Fuel Type | Diesel | Diesel |
| Engine Induction Type | Turbocharged | Turbocharged and intercooled |
| Engine Cylinders | 6 | 6 |
| Engine Displacement Value | 619 ci (10.1 L) | 619 ci (10.1 L) |
| Engine Rated Rpm | 2100 | 2100 |
| Engine Power Output Value | 275 hp (205.1 kW) | 290 hp (216.3 kW) |
| Transmission | ||
| Transmission Type | Partial power shift | Partial power shift |
| Transmission Forward Gears | 16 | 16 |
| Transmission Reverse Gears | 6 | 6 |
| Dimensions | ||
| Length Value | 223.5 | 223.5 |
| Operating Weight Value | 28270 lb (12823 kg) | 30270 lb (13730 kg) |
| Miscellaneous | ||
| Chassis | 4x4 articulated 4WD | 4x4 articulated 4WD |
| Drive Type | Four-wheel Drive (4WD) | 4WD |
| Front Tire Type | - | - |
| Rear Tire Type | - | - |
| Hitch Type | Three-Point Hitch | Three-Point Hitch |
| Hitch Category | III/IIIN | III/IIIN |
| Hitch Position | Rear | Rear |
| Hitch Capacity Value | 8545 lb (3876 kg) | 9260 lb (4200 kg) |
| Hydraulic System Type | Closed center | Closed center constant-pressure |
| Operator Station Type | Cab | Sound-Gard cab with air-conditioning |
| Starter Type | Electric | Electric |
