2008 Audi RS6 vs. 2009 BMW 650
To start off, 2009 BMW 650 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 (8 cylinders), 2009 BMW 650 is equipped with a bigger engine. In terms of performance, 2008 Audi RS6 (444 HP @ 5700 RPM) has 82 more horse power than 2009 BMW 650. (362 HP @ 6300 RPM). In normal driving conditions, 2008 Audi RS6 should accelerate faster than 2009 BMW 650. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi RS6 weights approximately 540 kg more than 2009 BMW 650. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Audi RS6 is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW 650. 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 (560 Nm @ 1950 RPM) has 69 more torque (in Nm) than 2009 BMW 650. (491 Nm @ 3900 RPM). This means 2008 Audi RS6 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW 650.
Compare all specifications:
| 2008 Audi RS6 | 2009 BMW 650 | |
| Make | Audi | BMW |
| Model | RS6 | 650 |
| Year Released | 2008 | 2009 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 4799 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 444 HP | 362 HP |
| Engine RPM | 5700 RPM | 6300 RPM |
| Torque | 560 Nm | 491 Nm |
| Torque RPM | 1950 RPM | 3900 RPM |
| Engine Bore Size | 84.5 mm | 92 mm |
| Engine Stroke Size | 93 mm | 82.7 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 4.7 seconds | 5.8 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1955 kg | 1415 kg |
| Vehicle Length | 4840 mm | 4830 mm |
| Vehicle Width | 1860 mm | 1380 mm |
| Vehicle Height | 1400 mm | 1860 mm |
| Wheelbase Size | 2770 mm | 2790 mm |
| Fuel Consumption Overall | 14.8 L/100km | 7 L/100km |
| Fuel Tank Capacity | 82 L | 70 L |
