2009 Audi A4 vs. 2009 Audi S8
To start off, both 2009 Audi A4 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 228 more horse power than 2009 Audi A4. (222 HP @ 4000 RPM) In normal driving conditions, 2009 Audi S8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 435 kg more than 2009 Audi S8.
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 90 more torque (in Nm) than 2009 Audi A4. (450 Nm @ 1400 RPM). This means 2009 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2009 Audi S8 has automatic transmission and 2009 Audi A4 has manual transmission. 2009 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi S8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 2009 Audi S8 | |
| Make | Audi | Audi |
| Model | A4 | S8 |
| Year Released | 2009 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2965 cc | 5204 cc |
| Engine Cylinders | 6 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 222 HP | 450 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 450 Nm | 540 Nm |
| Torque RPM | 1400 RPM | 3500 RPM |
| Engine Compression Ratio | 17.0:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline |
| Acceleration 0-100mph | 7.2 seconds | 5.1 seconds |
| Drive Type | 4WD | AWD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1610 kg | 1175 kg |
| Vehicle Length | 4550 mm | 5070 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Consumption Overall | 7.6 L/100km | 15.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
