2006 Aston Martin DB9 vs. 2006 BMW 645
To start off, both 2006 Aston Martin DB9 and 2006 BMW 645 were released in the same year (2006). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 5,932 cc (12 cylinders), 2006 Aston Martin DB9 is equipped with a bigger engine. In terms of performance, 2006 Aston Martin DB9 (450 HP @ 6000 RPM) has 122 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2006 Aston Martin DB9 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2006 Aston Martin DB9 weights approximately 18 kg more than 2006 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, 2006 Aston Martin DB9 (570 Nm @ 5000 RPM) has 120 more torque (in Nm) than 2006 BMW 645. (450 Nm @ 3600 RPM). This means 2006 Aston Martin DB9 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 645.
Compare all specifications:
| 2006 Aston Martin DB9 | 2006 BMW 645 | |
| Make | Aston Martin | BMW |
| Model | DB9 | 645 |
| Year Released | 2006 | 2006 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 5932 cc | 4398 cc |
| Engine Cylinders | 12 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 328 HP |
| Engine RPM | 6000 RPM | 6100 RPM |
| Torque | 570 Nm | 450 Nm |
| Torque RPM | 5000 RPM | 3600 RPM |
| Engine Bore Size | 89.1 mm | 92 mm |
| Engine Stroke Size | 79.5 mm | 82.7 mm |
| Engine Compression Ratio | 10.3:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 5.1 seconds | 5.6 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 | 1710 kg | 1692 kg |
| Vehicle Length | 4720 mm | 4830 mm |
| Vehicle Width | 1880 mm | 1860 mm |
| Vehicle Height | 1320 mm | 1380 mm |
| Wheelbase Size | 2750 mm | 2790 mm |
| Fuel Consumption Overall | 15.7 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 83 L | 70 L |
