2005 Audi A8 vs. 2008 Audi A6
To start off, 2008 Audi A6 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 Audi A8. In addition, the cost of maintenance, including insurance, on 2005 Audi A8 would be higher. At 3,936 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (271 HP @ 3750 RPM) has 110 more horse power than 2008 Audi A6. (161 HP @ 4000 RPM). In normal driving conditions, 2005 Audi A8 should accelerate faster than 2008 Audi A6. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 180 kg more than 2008 Audi A6. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Audi A6. In wet, icy, snow, or gravel driving conditions, 2005 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, 2005 Audi A8 (650 Nm @ 1800 RPM) has 340 more torque (in Nm) than 2008 Audi A6. (310 Nm @ 1400 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A6.
Compare all specifications:
| 2005 Audi A8 | 2008 Audi A6 | |
| Make | Audi | Audi |
| Model | A8 | A6 |
| Year Released | 2005 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 2495 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 271 HP | 161 HP |
| Engine RPM | 3750 RPM | 4000 RPM |
| Torque | 650 Nm | 310 Nm |
| Torque RPM | 1800 RPM | 1400 RPM |
| Engine Compression Ratio | 18.0:1 | 19.5:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 245 km/hour | 217 km/hour |
| Acceleration 0-100mph | 6.8 seconds | 9.3 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1770 kg | 1590 kg |
| Vehicle Length | 5190 mm | 4180 mm |
| Vehicle Height | 1460 mm | 1370 mm |
| Wheelbase Size | 3080 mm | 2770 mm |
| Fuel Consumption Overall | 9.6 L/100km | 6.9 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
