2008 Audi S8 vs. 2007 BMW 550
To start off, 2008 Audi S8 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 BMW 550. In addition, the cost of maintenance, including insurance, on 2007 BMW 550 would be higher. At 5,204 cc (10 cylinders), 2008 Audi S8 is equipped with a bigger engine. In terms of performance, 2007 BMW 550 (657 HP @ 3400 RPM) has 213 more horse power than 2008 Audi S8. (444 HP @ 7000 RPM) In normal driving conditions, 2007 BMW 550 should accelerate faster than 2008 Audi S8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi S8 weights approximately 280 kg more than 2007 BMW 550.
Because 2008 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2007 BMW 550. 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 50 more torque (in Nm) than 2007 BMW 550. (490 Nm @ 3400 RPM). This means 2008 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 550.
Compare all specifications:
| 2008 Audi S8 | 2007 BMW 550 | |
| Make | Audi | BMW |
| Model | S8 | 550 |
| Year Released | 2008 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 5204 cc | 4797 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 657 HP |
| Engine RPM | 7000 RPM | 3400 RPM |
| Torque | 540 Nm | 490 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Engine Compression Ratio | 12.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.4 seconds | 5.6 seconds |
| Drive Type | AWD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1940 kg | 1660 kg |
| Vehicle Width | 1900 mm | 1470 mm |
| Wheelbase Size | 2950 mm | 2890 mm |
| Fuel Consumption Overall | 13.4 L/100km | 10.8 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
