2008 Audi A8 vs. 2009 Audi A6
To start off, 2009 Audi A6 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi A8. In addition, the cost of maintenance, including insurance, on 2008 Audi A8 would be higher. At 4,172 cc (8 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (296 HP @ 6200 RPM) has 25 more horse power than 2008 Audi A8. (271 HP @ 3750 RPM) In normal driving conditions, 2009 Audi A6 should accelerate faster than 2008 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 129 kg more than 2009 Audi A6.
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, 2008 Audi A8 (650 Nm @ 1800 RPM) has 250 more torque (in Nm) than 2009 Audi A6. (400 Nm @ 3000 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A6.
Compare all specifications:
| 2008 Audi A8 | 2009 Audi A6 | |
| Make | Audi | Audi |
| Model | A8 | A6 |
| Year Released | 2008 | 2009 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 4172 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 271 HP | 296 HP |
| Engine RPM | 3750 RPM | 6200 RPM |
| Torque | 650 Nm | 400 Nm |
| Torque RPM | 1800 RPM | 3000 RPM |
| Engine Bore Size | 81 mm | 84.6 mm |
| Engine Stroke Size | 95.5 mm | 93 mm |
| Engine Compression Ratio | 18.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Acceleration 0-100mph | 6.8 seconds | 7.1 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1944 kg | 1815 kg |
| Vehicle Length | 5190 mm | 4840 mm |
| Vehicle Width | 1900 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1460 mm |
| Wheelbase Size | 3080 mm | 2770 mm |
| Fuel Consumption Overall | 9.6 L/100km | 13.1 L/100km |
| Fuel Tank Capacity | 90 L | 80 L |
