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 4,124 cc (8 cylinders), 2008 Audi S4 is equipped with a bigger engine. In terms of performance, 2008 Audi S4 (456 HP @ 6800 RPM) has 185 more horse power than 2008 Audi A8. (271 HP @ 3750 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 49 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 (650 Nm @ 1800 RPM) has 348 more torque (in Nm) than 2008 Audi S4. (302 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 | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 4124 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 271 HP | 456 HP |
| Engine RPM | 3750 RPM | 6800 RPM |
| Torque | 650 Nm | 302 Nm |
| Torque RPM | 1800 RPM | 3500 RPM |
| Engine Compression Ratio | 18.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 250 km/hour | 249 km/hour |
| Acceleration 0-100mph | 6.8 seconds | 6.1 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1944 kg | 1895 kg |
| Vehicle Length | 5190 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1400 mm |
| Vehicle Height | 1460 mm | 1400 mm |
| Wheelbase Size | 3080 mm | 2660 mm |
| Fuel Consumption Overall | 9.6 L/100km | 16.4 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
