2003 Audi A6 vs. 2006 Audi A8
To start off, 2006 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2003 Audi A6. In addition, the cost of maintenance, including insurance, on 2003 Audi A6 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 224 more horse power than 2003 Audi A6. (226 HP @ 5800 RPM) In normal driving conditions, 2006 Audi A8 should accelerate faster than 2003 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi A8 weights approximately 483 kg more than 2003 Audi A6. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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 270 more torque (in Nm) than 2003 Audi A6. (310 Nm @ 1700 RPM). This means 2006 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2003 Audi A6.
Compare all specifications:
| 2003 Audi A6 | 2006 Audi A8 | |
| Make | Audi | Audi |
| Model | A6 | A8 |
| Year Released | 2003 | 2006 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2671 cc | 5997 cc |
| Engine Type | V | W |
| Horse Power | 226 HP | 450 HP |
| Engine RPM | 5800 RPM | 6200 RPM |
| Torque | 310 Nm | 580 Nm |
| Torque RPM | 1700 RPM | 4000 RPM |
| Engine Bore Size | 81 mm | 84 mm |
| Engine Stroke Size | 86.4 mm | 90.2 mm |
| Engine Compression Ratio | 9.3:1 | 11.0:1 |
| Drive Type | 4WD | 4WD |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1662 kg | 2145 kg |
| Vehicle Length | 4800 mm | 5200 mm |
| Vehicle Width | 1820 mm | 1900 mm |
| Vehicle Height | 1460 mm | 1460 mm |
| Wheelbase Size | 2770 mm | 3080 mm |
| Fuel Consumption | 8.8 L/100km | 11.2 L/100km |
| Fuel Consumption City | 16.6 L/100km | 15.7 L/100km |
| Fuel Consumption Overall | 11.6 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
