2008 Audi A8 vs. 2008 Audi S4
To start off, both 2008 Audi A8 and 2008 Audi S4 were released in the same year (2008). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 4,163 cc (8 cylinders), 2008 Audi S4 is equipped with a bigger engine. In terms of performance, 2008 Audi S4 (339 HP @ 7000 RPM) has 108 more horse power than 2008 Audi A8. (231 HP @ 4000 RPM) In normal driving conditions, 2008 Audi S4 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 35 kg more than 2008 Audi S4.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 A8 (450 Nm @ 1400 RPM) has 40 more torque (in Nm) than 2008 Audi S4. (410 Nm @ 3500 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi S4.
Compare all specifications:
| 2008 Audi A8 | 2008 Audi S4 | |
| Make | Audi | Audi |
| Model | A8 | S4 |
| Year Released | 2008 | 2008 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4163 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 231 HP | 339 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 450 Nm | 410 Nm |
| Torque RPM | 1400 RPM | 3500 RPM |
| Engine Bore Size | 83 mm | 84.5 mm |
| Engine Stroke Size | 91.4 mm | 92.8 mm |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 243 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.8 seconds | 6.1 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1830 kg | 1795 kg |
| Vehicle Length | 5060 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1790 mm |
| Vehicle Height | 1450 mm | 1450 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption Overall | 8.4 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 90 L | 66 L |
