2008 Audi A8 vs. 2005 BMW M6
To start off, 2008 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW M6. In addition, the cost of maintenance, including insurance, on 2005 BMW M6 would be higher. At 4,998 cc (10 cylinders), 2005 BMW M6 is equipped with a bigger engine. In terms of performance, 2005 BMW M6 (500 HP @ 7750 RPM) has 269 more horse power than 2008 Audi A8. (231 HP @ 4000 RPM) In normal driving conditions, 2005 BMW M6 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 45 kg more than 2005 BMW M6.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW M6. In wet, icy, snow, or gravel driving conditions, 2008 Audi A8 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, 2005 BMW M6 (500 Nm @ 6100 RPM) has 50 more torque (in Nm) than 2008 Audi A8. (450 Nm @ 1400 RPM). This means 2005 BMW M6 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A8.
Compare all specifications:
| 2008 Audi A8 | 2005 BMW M6 | |
| Make | Audi | BMW |
| Model | A8 | M6 |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4998 cc |
| Engine Cylinders | 6 cylinders | 10 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 231 HP | 500 HP |
| Engine RPM | 4000 RPM | 7750 RPM |
| Torque | 450 Nm | 500 Nm |
| Torque RPM | 1400 RPM | 6100 RPM |
| Engine Bore Size | 83 mm | 92 mm |
| Engine Stroke Size | 91.4 mm | 75.2 mm |
| Engine Compression Ratio | 17.0:1 | 12.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 243 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.8 seconds | 4.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1830 kg | 1785 kg |
| Vehicle Length | 5060 mm | 4880 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2950 mm | 2890 mm |
| Fuel Consumption Overall | 8.4 L/100km | 14.8 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
