2006 BMW 550 vs. 2003 BMW 645
To start off, 2006 BMW 550 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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.
Compare all specifications:
| 2006 BMW 550 | 2003 BMW 645 | |
| Make | BMW | BMW |
| Model | 550 | 645 |
| Year Released | 2006 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 4398 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 0 HP | 325 HP |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Top Speed | 235 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.5 seconds | 5.9 seconds |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Fuel Tank Capacity | 70 L | 70 L |
