2009 BMW 550 vs. 2006 Audi S4
To start off, 2009 BMW 550 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 Audi S4. In addition, the cost of maintenance, including insurance, on 2006 Audi S4 would be higher. At 4,799 cc, 2009 BMW 550 is equipped with a bigger engine. In terms of performance, 2009 BMW 550 (657 HP @ 3400 RPM) has 318 more horse power than 2006 Audi S4. (339 HP @ 7000 RPM). In normal driving conditions, 2009 BMW 550 should accelerate faster than 2006 Audi S4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi S4 weights approximately 75 kg more than 2009 BMW 550.
Because 2006 Audi S4 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, 2006 Audi S4 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, 2009 BMW 550 (490 Nm @ 3400 RPM) has 80 more torque (in Nm) than 2006 Audi S4. (410 Nm @ 3500 RPM). This means 2009 BMW 550 will have an easier job in driving up hills or pulling heavy equipment than 2006 Audi S4.
Compare all specifications:
| 2009 BMW 550 | 2006 Audi S4 | |
| Make | BMW | Audi |
| Model | 550 | S4 |
| Year Released | 2009 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 4799 cc | 4162 cc |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 657 HP | 339 HP |
| Engine RPM | 3400 RPM | 7000 RPM |
| Torque | 490 Nm | 410 Nm |
| Torque RPM | 3400 RPM | 3500 RPM |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 5.6 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1660 kg | 1735 kg |
| Vehicle Length | 4850 mm | 4580 mm |
| Vehicle Width | 1470 mm | 1790 mm |
| Vehicle Height | 1850 mm | 1420 mm |
| Wheelbase Size | 2890 mm | 2660 mm |
| Fuel Consumption Overall | 10.8 L/100km | 13.4 L/100km |
| Fuel Tank Capacity | 70 L | 63 L |
