2006 BMW 645 vs. 2010 Audi A8
To start off, 2010 Audi A8 is newer by 4 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2010 Audi A8 (350 HP @ 6800 RPM) has 22 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM) In normal driving conditions, 2010 Audi A8 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2010 Audi A8 weights approximately 190 kg more than 2006 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2010 Audi A8 is all wheel drive (AWD), it will have significant more traction and grip than 2006 BMW 645. In wet, icy, snow, or gravel driving conditions, 2010 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 645 (450 Nm @ 3600 RPM) has 10 more torque (in Nm) than 2010 Audi A8. (440 Nm @ 3500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2010 Audi A8.
Compare all specifications:
| 2006 BMW 645 | 2010 Audi A8 | |
| Make | BMW | Audi |
| Model | 645 | A8 |
| Year Released | 2006 | 2010 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4200 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 350 HP |
| Engine RPM | 6100 RPM | 6800 RPM |
| Torque | 450 Nm | 440 Nm |
| Torque RPM | 3600 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | AWD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1810 kg | 2000 kg |
| Vehicle Length | 4830 mm | 5062 mm |
| Vehicle Width | 1860 mm | 1895 mm |
| Vehicle Height | 1380 mm | 1445 mm |
| Wheelbase Size | 2790 mm | 2944 mm |
| Fuel Tank Capacity | 70 L | 90 L |
