2009 Audi A4 vs. 2008 Audi S8
To start off, 2009 Audi A4 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi S8. In addition, the cost of maintenance, including insurance, on 2008 Audi S8 would be higher. At 5,204 cc (10 cylinders), 2008 Audi S8 is equipped with a bigger engine. In terms of performance, 2008 Audi S8 (444 HP @ 7000 RPM) has 303 more horse power than 2009 Audi A4. (141 HP @ 4200 RPM) In normal driving conditions, 2008 Audi S8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S8 weights approximately 1045 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.
Because 2008 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2009 Audi A4. In wet, icy, snow, or gravel driving conditions, 2008 Audi S8 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, 2008 Audi S8 (540 Nm @ 3500 RPM) has 220 more torque (in Nm) than 2009 Audi A4. (320 Nm @ 1750 RPM). This means 2008 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2008 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. 2008 Audi S8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 2008 Audi S8 | |
| Make | Audi | Audi |
| Model | A4 | S8 |
| Year Released | 2009 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1968 cc | 5204 cc |
| Engine Cylinders | 4 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 141 HP | 444 HP |
| Engine RPM | 4200 RPM | 7000 RPM |
| Torque | 320 Nm | 540 Nm |
| Torque RPM | 1750 RPM | 3500 RPM |
| Engine Bore Size | 81 mm | 84.5 mm |
| Engine Stroke Size | 95.5 mm | 92.8 mm |
| Engine Compression Ratio | 16.5:1 | 12.5:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 215 km/hour | 250 km/hour |
| Acceleration 0-100mph | 9.4 seconds | 5.4 seconds |
| Drive Type | Front | AWD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 895 kg | 1940 kg |
| Vehicle Width | 2010 mm | 1900 mm |
| Wheelbase Size | 2810 mm | 2950 mm |
| Fuel Consumption Overall | 5.5 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 65 L | 90 L |
