2009 Aston Martin DB9 vs. 2007 BMW 325
To start off, 2009 Aston Martin DB9 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 BMW 325. In addition, the cost of maintenance, including insurance, on 2007 BMW 325 would be higher. At 5,933 cc (12 cylinders), 2009 Aston Martin DB9 is equipped with a bigger engine. In terms of performance, 2009 Aston Martin DB9 (510 HP @ 6500 RPM) has 295 more horse power than 2007 BMW 325. (215 HP @ 5600 RPM). In normal driving conditions, 2009 Aston Martin DB9 should accelerate faster than 2007 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2009 Aston Martin DB9 weights approximately 340 kg more than 2007 BMW 325. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2009 Aston Martin DB9 (570 Nm @ 5750 RPM) has 320 more torque (in Nm) than 2007 BMW 325. (250 Nm @ 2750 RPM). This means 2009 Aston Martin DB9 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 325.
Compare all specifications:
| 2009 Aston Martin DB9 | 2007 BMW 325 | |
| Make | Aston Martin | BMW |
| Model | DB9 | 325 |
| Year Released | 2009 | 2007 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Front |
| Engine Size | 5933 cc | 2497 cc |
| Engine Cylinders | 12 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 510 HP | 215 HP |
| Engine RPM | 6500 RPM | 5600 RPM |
| Torque | 570 Nm | 250 Nm |
| Torque RPM | 5750 RPM | 2750 RPM |
| Engine Bore Size | 89 mm | 78.8 mm |
| Engine Stroke Size | 79.5 mm | 82 mm |
| Engine Compression Ratio | 10.9:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 305 km/hour | 247 km/hour |
| Acceleration 0-100mph | 4.5 seconds | 6.9 seconds |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1760 kg | 1420 kg |
| Vehicle Length | 4730 mm | 4590 mm |
| Vehicle Width | 1910 mm | 1400 mm |
| Vehicle Height | 1290 mm | 1790 mm |
| Wheelbase Size | 2750 mm | 2770 mm |
| Fuel Consumption Overall | 16.3 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 78 L | 63 L |
