2006 Audi A8 vs. 2008 BMW 523
To start off, 2008 BMW 523 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 Audi A8. In addition, the cost of maintenance, including insurance, on 2006 Audi A8 would be higher. At 5,997 cc, 2006 Audi A8 is equipped with a bigger engine. In terms of performance, 2006 Audi A8 (450 HP @ 6200 RPM) has 275 more horse power than 2008 BMW 523. (175 HP @ 5800 RPM). In normal driving conditions, 2006 Audi A8 should accelerate faster than 2008 BMW 523. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi A8 weights approximately 655 kg more than 2008 BMW 523. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2006 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 523. In wet, icy, snow, or gravel driving conditions, 2006 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 Audi A8 (580 Nm @ 4000 RPM) has 350 more torque (in Nm) than 2008 BMW 523. (230 Nm @ 3500 RPM). This means 2006 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW 523.
Compare all specifications:
| 2006 Audi A8 | 2008 BMW 523 | |
| Make | Audi | BMW |
| Model | A8 | 523 |
| Year Released | 2006 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5997 cc | 2497 cc |
| Engine Type | W | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 175 HP |
| Engine RPM | 6200 RPM | 5800 RPM |
| Torque | 580 Nm | 230 Nm |
| Torque RPM | 4000 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 78.8 mm |
| Engine Stroke Size | 90.2 mm | 82 mm |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 2145 kg | 1490 kg |
| Vehicle Length | 5200 mm | 4850 mm |
| Vehicle Width | 1900 mm | 1850 mm |
| Vehicle Height | 1460 mm | 1470 mm |
| Wheelbase Size | 3080 mm | 2890 mm |
| Fuel Consumption Overall | 13.8 L/100km | 11.1 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
