2009 Audi S4 vs. 2009 Audi S8
To start off, both 2009 Audi S4 and 2009 Audi S8 were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 5,204 cc (10 cylinders), 2009 Audi S8 is equipped with a bigger engine. In terms of performance, 2009 Audi S8 (450 HP @ 7000 RPM) has 110 more horse power than 2009 Audi S4. (340 HP @ 6800 RPM) In normal driving conditions, 2009 Audi S8 should accelerate faster than 2009 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi S8 weights approximately 245 kg more than 2009 Audi S4. 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, 2009 Audi S8 (540 Nm @ 3500 RPM) has 130 more torque (in Nm) than 2009 Audi S4. (410 Nm @ 3500 RPM). This means 2009 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi S4.
Compare all specifications:
| 2009 Audi S4 | 2009 Audi S8 | |
| Make | Audi | Audi |
| Model | S4 | S8 |
| Year Released | 2009 | 2009 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 5204 cc |
| Engine Cylinders | 8 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 450 HP |
| Engine RPM | 6800 RPM | 7000 RPM |
| Torque | 410 Nm | 540 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | 4WD | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 930 kg | 1175 kg |
| Vehicle Length | 4580 mm | 5070 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1430 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Consumption | 11.2 L/100km | 12.4 L/100km |
| Fuel Consumption City | 16.8 L/100km | 18.2 L/100km |
| Fuel Consumption Overall | 14.7 L/100km | 15.8 L/100km |
| Fuel Tank Capacity | 63 L | 90 L |
