2008 Audi A8 vs. 2006 BMW 650
To start off, 2008 Audi A8 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 BMW 650. In addition, the cost of maintenance, including insurance, on 2006 BMW 650 would be higher. At 4,800 cc (8 cylinders), 2006 BMW 650 is equipped with a bigger engine. In terms of performance, 2006 BMW 650 (360 HP @ 6300 RPM) has 130 more horse power than 2008 Audi A8. (230 HP @ 4000 RPM) In normal driving conditions, 2006 BMW 650 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 106 kg more than 2006 BMW 650.
Because 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 650. 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, 2006 BMW 650 (488 Nm @ 3400 RPM) has 38 more torque (in Nm) than 2008 Audi A8. (450 Nm @ 1400 RPM). This means 2006 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A8.
Compare all specifications:
| 2008 Audi A8 | 2006 BMW 650 | |
| Make | Audi | BMW |
| Model | A8 | 650 |
| Year Released | 2008 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4800 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 230 HP | 360 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 450 Nm | 488 Nm |
| Torque RPM | 1400 RPM | 3400 RPM |
| Engine Bore Size | 83 mm | 93 mm |
| Engine Stroke Size | 91.4 mm | 88.3 mm |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 243 km/hour | 241 km/hour |
| Drive Type | 4WD | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1836 kg | 1730 kg |
| Vehicle Length | 5060 mm | 4840 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1450 mm | 1380 mm |
| Wheelbase Size | 2950 mm | 2790 mm |
| Fuel Consumption Overall | 8.4 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
