2003 Alfa Romeo 8C Competizione vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 8C Competizione. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 8C Competizione would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 Alfa Romeo 8C Competizione (400 HP @ 7000 RPM) has 72 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2003 Alfa Romeo 8C Competizione should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 315 kg more than 2003 Alfa Romeo 8C Competizione.
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 9 more torque (in Nm) than 2003 Alfa Romeo 8C Competizione. (441 Nm @ 4500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo 8C Competizione.
Compare all specifications:
| 2003 Alfa Romeo 8C Competizione | 2006 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 8C Competizione | 645 |
| Year Released | 2003 | 2006 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4242 cc | 4398 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 400 HP | 328 HP |
| Engine RPM | 7000 RPM | 6100 RPM |
| Torque | 441 Nm | 450 Nm |
| Torque RPM | 4500 RPM | 3600 RPM |
| Engine Bore Size | 92 mm | 92 mm |
| Engine Stroke Size | 79.8 mm | 82.7 mm |
| Top Speed | 300 km/hour | 250 km/hour |
| Acceleration 0-100mph | 4.5 seconds | 6.4 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1500 kg | 1815 kg |
| Vehicle Length | 4280 mm | 4830 mm |
| Vehicle Width | 1910 mm | 1860 mm |
| Vehicle Height | 1260 mm | 1380 mm |
| Wheelbase Size | 2600 mm | 2790 mm |
| Fuel Tank Capacity | 90 L | 70 L |
