2009 Audi A4 vs. 2007 Audi S8
To start off, 2009 Audi A4 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi S8. In addition, the cost of maintenance, including insurance, on 2007 Audi S8 would be higher. At 5,204 cc (10 cylinders), 2007 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 Audi S8 (444 HP @ 7000 RPM) has 233 more horse power than 2009 Audi A4. (211 HP @ 4300 RPM) In normal driving conditions, 2007 Audi S8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi S8 weights approximately 908 kg more than 2009 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2007 Audi S8 (540 Nm @ 3500 RPM) has 190 more torque (in Nm) than 2009 Audi A4. (350 Nm @ 1500 RPM). This means 2007 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4.
Compare all specifications:
| 2009 Audi A4 | 2007 Audi S8 | |
| Make | Audi | Audi |
| Model | A4 | S8 |
| Year Released | 2009 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1984 cc | 5204 cc |
| Engine Cylinders | 4 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 211 HP | 444 HP |
| Engine RPM | 4300 RPM | 7000 RPM |
| Torque | 350 Nm | 540 Nm |
| Torque RPM | 1500 RPM | 3500 RPM |
| Engine Bore Size | 82.5 mm | 84.5 mm |
| Engine Stroke Size | 92.8 mm | 92.8 mm |
| Engine Compression Ratio | 9.6:1 | 12.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1032 kg | 1940 kg |
| Vehicle Length | 4710 mm | 5070 mm |
| Vehicle Width | 1840 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2820 mm | 2950 mm |
| Fuel Consumption Overall | 9.4 L/100km | 13.6 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
