2003 BMW 645 vs. 2005 BMW 730
To start off, 2005 BMW 730 is newer by 2 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. In terms of performance, 2003 BMW 645 (310 HP @ 6000 RPM) has 85 more horse power than 2005 BMW 730. (225 HP @ 6250 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2005 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 730 weights approximately 92 kg more than 2003 BMW 645.
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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 150 more torque (in Nm) than 2005 BMW 730. (300 Nm @ 3500 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW 730.
Compare all specifications:
2003 BMW 645 | 2005 BMW 730 | |
Make | BMW | BMW |
Model | 645 | 730 |
Year Released | 2003 | 2005 |
Body Type | Coupe | Sedan |
Engine Position | Front | Front |
Engine Size | 4398 cc | 2982 cc |
Engine Cylinders | 8 cylinders | 6 cylinders |
Engine Type | V | in-line |
Valves per Cylinder | 4 valves | 4 valves |
Horse Power | 310 HP | 225 HP |
Engine RPM | 6000 RPM | 6250 RPM |
Torque | 450 Nm | 300 Nm |
Torque RPM | 3600 RPM | 3500 RPM |
Engine Bore Size | 92 mm | 84 mm |
Engine Stroke Size | 82.7 mm | 90 mm |
Engine Compression Ratio | 10.5:1 | 10.2:1 |
Drive Type | Rear | Rear |
Transmission Type | Automatic | Automatic |
Number of Seats | 4 seats | 5 seats |
Number of Doors | 2 doors | 4 doors |
Vehicle Weight | 1698 kg | 1790 kg |
Vehicle Length | 4830 mm | 5040 mm |
Vehicle Width | 1860 mm | 1910 mm |
Vehicle Height | 1380 mm | 1500 mm |
Wheelbase Size | 2790 mm | 3000 mm |
Fuel Tank Capacity | 70 L | 63 L |