2009 Audi S5 vs. 2008 BMW 550
To start off, 2009 Audi S5 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 BMW 550. In addition, the cost of maintenance, including insurance, on 2008 BMW 550 would be higher. At 4,163 cc (8 cylinders), 2009 Audi S5 is equipped with a bigger engine. In terms of performance, 2008 BMW 550 (362 HP @ 6300 RPM) has 8 more horse power than 2009 Audi S5. (354 HP @ 6800 RPM) In normal driving conditions, 2008 BMW 550 should accelerate faster than 2009 Audi S5. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi S5 weights approximately 110 kg more than 2008 BMW 550.
Because 2009 Audi S5 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 550. In wet, icy, snow, or gravel driving conditions, 2009 Audi S5 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 BMW 550 (491 Nm @ 3400 RPM) has 50 more torque (in Nm) than 2009 Audi S5. (441 Nm @ 3500 RPM). This means 2008 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi S5.
Compare all specifications:
| 2009 Audi S5 | 2008 BMW 550 | |
| Make | Audi | BMW |
| Model | S5 | 550 |
| Year Released | 2009 | 2008 |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2497 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 354 HP | 362 HP |
| Engine RPM | 6800 RPM | 6300 RPM |
| Torque | 441 Nm | 491 Nm |
| Torque RPM | 3500 RPM | 3400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 249 km/hour | 235 km/hour |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1770 kg | 1660 kg |
| Vehicle Length | 4640 mm | 4850 mm |
| Vehicle Width | 1990 mm | 1490 mm |
| Vehicle Height | 1380 mm | 1850 mm |
| Wheelbase Size | 2760 mm | 2890 mm |
| Fuel Consumption Overall | 14.7 L/100km | 11.1 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
