2008 BMW 645 vs. 2013 BMW M3
To start off, 2013 BMW M3 is newer by 5 year(s). Which means there will be less support and parts availability for 2008 BMW 645. In addition, the cost of maintenance, including insurance, on 2008 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2013 BMW M3 (408 HP @ 8300 RPM) has 80 more horse power than 2008 BMW 645. (328 HP @ 6100 RPM) In normal driving conditions, 2013 BMW M3 should accelerate faster than 2008 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW M3 weights approximately 190 kg more than 2008 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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 50 more torque (in Nm) than 2013 BMW M3. (400 Nm @ 3900 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2013 BMW M3.
Compare all specifications:
| 2008 BMW 645 | 2013 BMW M3 | |
| Make | BMW | BMW |
| Model | 645 | M3 |
| Year Released | 2008 | 2013 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 3999 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 408 HP |
| Engine RPM | 6100 RPM | 8300 RPM |
| Torque | 450 Nm | 400 Nm |
| Torque RPM | 3600 RPM | 3900 RPM |
| Engine Bore Size | 92.1 mm | 92 mm |
| Engine Stroke Size | 82.7 mm | 75 mm |
| Engine Compression Ratio | 10.0:1 | 12.0 : 1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Acceleration 0-100mph | 5.6 seconds | 5.3 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | 6-speed manual |
| Vehicle Weight | 1690 kg | 1880 kg |
| Vehicle Length | 4830 mm | 4618 mm |
| Vehicle Width | 1860 mm | 1976 mm |
| Vehicle Height | 1380 mm | 1392 mm |
| Wheelbase Size | 2790 mm | 2761 mm |
| Fuel Tank Capacity | 70 L | 63 L |
