2009 Aston Martin DB9 vs. 2005 Porsche 911
To start off, 2009 Aston Martin DB9 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Porsche 911. In addition, the cost of maintenance, including insurance, on 2005 Porsche 911 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 195 more horse power than 2005 Porsche 911. (315 HP @ 6800 RPM). In normal driving conditions, 2009 Aston Martin DB9 should accelerate faster than 2005 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 2009 Aston Martin DB9 weights approximately 195 kg more than 2005 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Aston Martin DB9. In wet, icy, snow, or gravel driving conditions, 2005 Porsche 911 will offer significantly more control. 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, 2009 Aston Martin DB9 (570 Nm @ 5750 RPM) has 200 more torque (in Nm) than 2005 Porsche 911. (370 Nm @ 4250 RPM). This means 2009 Aston Martin DB9 will have an easier job in driving up hills or pulling heavy equipment than 2005 Porsche 911.
Compare all specifications:
| 2009 Aston Martin DB9 | 2005 Porsche 911 | |
| Make | Aston Martin | Porsche |
| Model | DB9 | 911 |
| Year Released | 2009 | 2005 |
| Body Type | Coupe | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 5933 cc | 3596 cc |
| Engine Cylinders | 12 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 510 HP | 315 HP |
| Engine RPM | 6500 RPM | 6800 RPM |
| Torque | 570 Nm | 370 Nm |
| Torque RPM | 5750 RPM | 4250 RPM |
| Engine Bore Size | 89 mm | 96 mm |
| Engine Stroke Size | 79.5 mm | 82.8 mm |
| Engine Compression Ratio | 10.9:1 | 11.3:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 305 km/hour | 280 km/hour |
| Acceleration 0-100mph | 4.5 seconds | 5.3 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1760 kg | 1565 kg |
| Vehicle Length | 4730 mm | 4440 mm |
| Vehicle Width | 1910 mm | 1840 mm |
| Vehicle Height | 1290 mm | 1300 mm |
| Wheelbase Size | 2750 mm | 2360 mm |
| Fuel Consumption Overall | 16.3 L/100km | 11.4 L/100km |
| Fuel Tank Capacity | 78 L | 64 L |
