2003 BMW 645 vs. 2007 BMW 550
To start off, 2007 BMW 550 is newer by 4 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 4,797 cc, 2007 BMW 550 is equipped with a bigger engine. In terms of performance, 2007 BMW 550 (657 HP @ 3400 RPM) has 336 more horse power than 2003 BMW 645. (321 HP @ 6100 RPM) In normal driving conditions, 2007 BMW 550 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 235 kg more than 2007 BMW 550.
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. Let's talk about torque, 2007 BMW 550 (490 Nm @ 3400 RPM) has 40 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2007 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
2003 BMW 645 | 2007 BMW 550 | |
Make | BMW | BMW |
Model | 645 | 550 |
Year Released | 2003 | 2007 |
Engine Position | Front | Front |
Engine Size | 4398 cc | 4797 cc |
Valves per Cylinder | 4 valves | 4 valves |
Horse Power | 321 HP | 657 HP |
Engine RPM | 6100 RPM | 3400 RPM |
Torque | 450 Nm | 490 Nm |
Torque RPM | 3600 RPM | 3400 RPM |
Engine Compression Ratio | 10.5:1 | 10.5:1 |
Top Speed | 250 km/hour | 250 km/hour |
Acceleration 0-100mph | 6.2 seconds | 5.6 seconds |
Drive Type | Rear | Rear |
Transmission Type | Automatic | Automatic |
Number of Seats | 4 seats | 5 seats |
Number of Doors | 2 doors | 5 doors |
Vehicle Weight | 1895 kg | 1660 kg |
Vehicle Length | 4830 mm | 4850 mm |
Vehicle Width | 1860 mm | 1470 mm |
Vehicle Height | 1380 mm | 1850 mm |
Wheelbase Size | 2790 mm | 2890 mm |
Fuel Consumption Overall | 11.5 L/100km | 10.8 L/100km |
Fuel Tank Capacity | 70 L | 70 L |