2006 BMW 645 vs. 2009 BMW M3
To start off, 2009 BMW M3 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2009 BMW M3 (414 HP @ 8300 RPM) has 86 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM) In normal driving conditions, 2009 BMW M3 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 311 kg more than 2009 BMW M3.
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 50 more torque (in Nm) than 2009 BMW M3. (400 Nm @ 3900 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW M3.
Compare all specifications:
| 2006 BMW 645 | 2009 BMW M3 | |
| Make | BMW | BMW |
| Model | 645 | M3 |
| Year Released | 2006 | 2009 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 3999 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 328 HP | 414 HP |
| Engine RPM | 6100 RPM | 8300 RPM |
| Torque | 450 Nm | 400 Nm |
| Torque RPM | 3600 RPM | 3900 RPM |
| Engine Compression Ratio | 10.0:1 | 12.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 245 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 4.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1836 kg | 1525 kg |
| Vehicle Length | 4830 mm | 4620 mm |
| Vehicle Width | 1860 mm | 1420 mm |
| Vehicle Height | 1380 mm | 1760 mm |
| Wheelbase Size | 2790 mm | 2770 mm |
| Fuel Consumption Overall | 12.8 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 70 L | 63 L |
