2009 BMW X6 vs. 2012 BMW 640
To start off, 2012 BMW 640 is newer by 3 year(s). Which means there will be less support and parts availability for 2009 BMW X6. In addition, the cost of maintenance, including insurance, on 2009 BMW X6 would be higher. At 2,996 cc (6 cylinders), 2009 BMW X6 is equipped with a bigger engine. In terms of performance, 2012 BMW 640 (311 HP @ 4400 RPM) has 29 more horse power than 2009 BMW X6. (282 HP @ 4400 RPM) In normal driving conditions, 2012 BMW 640 should accelerate faster than 2009 BMW X6. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW X6 weights approximately 250 kg more than 2012 BMW 640.
Because 2009 BMW X6 is four wheel drive (4WD), it will have significant more traction and grip than 2012 BMW 640. In wet, icy, snow, or gravel driving conditions, 2009 BMW X6 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2012 BMW 640 (630 Nm @ 1500 RPM) has 50 more torque (in Nm) than 2009 BMW X6. (580 Nm @ 1750 RPM). This means 2012 BMW 640 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW X6.
Compare all specifications:
| 2009 BMW X6 | 2012 BMW 640 | |
| Make | BMW | BMW |
| Model | X6 | 640 |
| Year Released | 2009 | 2012 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 2993 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 282 HP | 311 HP |
| Engine RPM | 4400 RPM | 4400 RPM |
| Torque | 580 Nm | 630 Nm |
| Torque RPM | 1750 RPM | 1500 RPM |
| Engine Bore Size | 84 mm | 90 mm |
| Engine Stroke Size | 90 mm | 84 mm |
| Fuel Type | Diesel | Diesel |
| Top Speed | 236 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.9 seconds | 5.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | 8-speed shiftable automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2185 kg | 1935 kg |
| Vehicle Length | 4880 mm | 4894 mm |
| Vehicle Width | 1990 mm | 1894 mm |
| Vehicle Height | 1700 mm | 1365 mm |
| Wheelbase Size | 2940 mm | 2855 mm |
| Fuel Consumption Overall | 8.3 L/100km | 5.5 L/100km |
| Fuel Tank Capacity | 85 L | 70 L |
