2009 Aston Martin DB9 vs. 2005 Audi S4
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 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 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 170 more horse power than 2005 Audi S4. (340 HP @ 4000 RPM). In normal driving conditions, 2009 Aston Martin DB9 should accelerate faster than 2005 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 25 kg more than 2009 Aston Martin DB9.
Let's talk about torque, 2009 Aston Martin DB9 (570 Nm) has 160 more torque (in Nm) than 2005 Audi S4. (410 Nm). This means 2009 Aston Martin DB9 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4.
Compare all specifications:
| 2009 Aston Martin DB9 | 2005 Audi S4 | |
| Make | Aston Martin | Audi |
| Model | DB9 | S4 |
| Year Released | 2009 | 2005 |
| Body Type | Coupe | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 5933 cc | 4172 cc |
| Engine Cylinders | 12 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 510 HP | 340 HP |
| Engine RPM | 6500 RPM | 4000 RPM |
| Torque | 570 Nm | 410 Nm |
| Engine Bore Size | 89 mm | 85 mm |
| Engine Stroke Size | 79.5 mm | 93 mm |
| Engine Compression Ratio | 10.9:1 | 11.0:1 |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1760 kg | 1785 kg |
| Vehicle Length | 4730 mm | 4550 mm |
| Vehicle Width | 1910 mm | 1770 mm |
| Vehicle Height | 1290 mm | 1430 mm |
| Wheelbase Size | 2750 mm | 2470 mm |
| Fuel Consumption Highway | 12.4 L/100km | 11.2 L/100km |
| Fuel Consumption City | 19.7 L/100km | 15.7 L/100km |
| Fuel Consumption Overall | 16.3 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 78 L | 66 L |
