2009 Audi A8 vs. 2006 BMW 630
To start off, 2009 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 BMW 630. In addition, the cost of maintenance, including insurance, on 2006 BMW 630 would be higher. At 3,936 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (272 HP @ 3750 RPM) has 18 more horse power than 2006 BMW 630. (254 HP @ 6600 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2006 BMW 630. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 180 kg more than 2006 BMW 630. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 630. In wet, icy, snow, or gravel driving conditions, 2009 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, 2009 Audi A8 (650 Nm @ 1800 RPM) has 350 more torque (in Nm) than 2006 BMW 630. (300 Nm @ 2500 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW 630.
Compare all specifications:
| 2009 Audi A8 | 2006 BMW 630 | |
| Make | Audi | BMW |
| Model | A8 | 630 |
| Year Released | 2009 | 2006 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 2996 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 272 HP | 254 HP |
| Engine RPM | 3750 RPM | 6600 RPM |
| Torque | 650 Nm | 300 Nm |
| Torque RPM | 1800 RPM | 2500 RPM |
| Engine Bore Size | 81 mm | 85 mm |
| Engine Stroke Size | 95.5 mm | 88 mm |
| Engine Compression Ratio | 18.0:1 | 10.7:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.8 seconds | 7.2 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 | 1940 kg | 1760 kg |
| Vehicle Length | 5190 mm | 4830 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1380 mm |
| Wheelbase Size | 3080 mm | 2790 mm |
| Fuel Consumption Overall | 9.6 L/100km | 9.6 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
