2008 Audi RS6 vs. 2009 BMW 550
To start off, 2009 BMW 550 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi RS6. In addition, the cost of maintenance, including insurance, on 2008 Audi RS6 would be higher. At 4,799 cc, 2009 BMW 550 is equipped with a bigger engine. In terms of performance, 2008 Audi RS6 (580 HP @ 6250 RPM) has 218 more horse power than 2009 BMW 550. (362 HP @ 6300 RPM). In normal driving conditions, 2008 Audi RS6 should accelerate faster than 2009 BMW 550.
Because 2008 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW 550. In wet, icy, snow, or gravel driving conditions, 2008 Audi RS6 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 RS6 (881 Nm @ 6250 RPM) has 391 more torque (in Nm) than 2009 BMW 550. (490 Nm @ 3400 RPM). This means 2008 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 550.
Compare all specifications:
| 2008 Audi RS6 | 2009 BMW 550 | |
| Make | Audi | BMW |
| Model | RS6 | 550 |
| Year Released | 2008 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 4175 cc | 4799 cc |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 580 HP | 362 HP |
| Engine RPM | 6250 RPM | 6300 RPM |
| Torque | 881 Nm | 490 Nm |
| Torque RPM | 6250 RPM | 3400 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 244 km/hour | 250 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Width | 1820 mm | 1470 mm |
