2006 BMW 730 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW 730. In addition, the cost of maintenance, including insurance, on 2006 BMW 730 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 74 more horse power than 2006 BMW 730. (254 HP @ 6600 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 2006 BMW 730. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 730 weights approximately 130 kg more than 2008 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 150 more torque (in Nm) than 2006 BMW 730. (300 Nm @ 2500 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 730. 2006 BMW 730 has automatic transmission and 2008 BMW 645 has manual transmission. 2008 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 BMW 730 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 730 | 2008 BMW 645 | |
| Make | BMW | BMW |
| Model | 730 | 645 |
| Year Released | 2006 | 2008 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2994 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 254 HP | 328 HP |
| Engine RPM | 6600 RPM | 6100 RPM |
| Torque | 300 Nm | 450 Nm |
| Torque RPM | 2500 RPM | 3600 RPM |
| Engine Compression Ratio | 10.7:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 244 km/hour | 245 km/hour |
| Acceleration 0-100mph | 7.9 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1820 kg | 1690 kg |
| Vehicle Length | 5180 mm | 4830 mm |
| Vehicle Width | 1910 mm | 1860 mm |
| Vehicle Height | 1500 mm | 1380 mm |
| Wheelbase Size | 3140 mm | 2790 mm |
| Fuel Consumption Overall | 10.1 L/100km | 11.7 L/100km |
| Fuel Tank Capacity | 88 L | 70 L |
