2007 BMW X5 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 BMW X5. In addition, the cost of maintenance, including insurance, on 2007 BMW X5 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 127 more horse power than 2007 BMW X5. (201 HP @ 4000 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 2007 BMW X5. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW X5 weights approximately 424 kg more than 2008 BMW 645.
Because 2007 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 645. In wet, icy, snow, or gravel driving conditions, 2007 BMW X5 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, 2007 BMW X5 (480 Nm @ 2000 RPM) has 30 more torque (in Nm) than 2008 BMW 645. (450 Nm @ 3600 RPM). This means 2007 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 645.
Compare all specifications:
| 2007 BMW X5 | 2008 BMW 645 | |
| Make | BMW | BMW |
| Model | X5 | 645 |
| Year Released | 2007 | 2008 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 201 HP | 328 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 480 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92.1 mm |
| Engine Stroke Size | 88 mm | 82.7 mm |
| Engine Compression Ratio | 18.0:1 | 10.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Acceleration 0-100mph | 10.3 seconds | 5.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 2114 kg | 1690 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1720 mm | 1860 mm |
| Vehicle Height | 1880 mm | 1380 mm |
| Wheelbase Size | 2830 mm | 2790 mm |
| Fuel Consumption Overall | 11 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 85 L | 70 L |
