2001 BMW 730 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 5 year(s). Which means there will be less support and parts availability for 2001 BMW 730. In addition, the cost of maintenance, including insurance, on 2001 BMW 730 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 101 more horse power than 2001 BMW 730. (227 HP @ 5900 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2001 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2001 BMW 730 weights approximately 10 kg more than 2006 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 150 more torque (in Nm) than 2001 BMW 730. (300 Nm @ 3500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2001 BMW 730.
Compare all specifications:
| 2001 BMW 730 | 2006 BMW 645 | |
| Make | BMW | BMW |
| Model | 730 | 645 |
| Year Released | 2001 | 2006 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2925 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 227 HP | 328 HP |
| Engine RPM | 5900 RPM | 6100 RPM |
| Torque | 300 Nm | 450 Nm |
| Torque RPM | 3500 RPM | 3600 RPM |
| Engine Compression Ratio | 10.2:1 | 10.0:1 |
| Top Speed | 237 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.3 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1820 kg | 1810 kg |
| Vehicle Length | 5180 mm | 4830 mm |
| Vehicle Width | 1910 mm | 1860 mm |
| Vehicle Height | 1500 mm | 1380 mm |
| Wheelbase Size | 3000 mm | 2790 mm |
| Fuel Tank Capacity | 88 L | 70 L |
