2009 Audi A8 vs. 2006 Audi A4
To start off, 2009 Audi A8 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 Audi A4. In addition, the cost of maintenance, including insurance, on 2006 Audi A4 would be higher. At 2,772 cc (6 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2009 Audi A8 (207 HP @ 5500 RPM) has 69 more horse power than 2006 Audi A4. (138 HP @ 4000 RPM). In normal driving conditions, 2009 Audi A8 should accelerate faster than 2006 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 160 kg more than 2006 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than 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 A4 (320 Nm @ 1800 RPM) has 40 more torque (in Nm) than 2009 Audi A8. (280 Nm @ 3000 RPM). This means 2006 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A8.
Compare all specifications:
| 2009 Audi A8 | 2006 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2009 | 2006 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2772 cc | 1968 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 207 HP | 138 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 280 Nm | 320 Nm |
| Torque RPM | 3000 RPM | 1800 RPM |
| Engine Bore Size | 84.5 mm | 81 mm |
| Engine Stroke Size | 82.4 mm | 95.5 mm |
| Engine Compression Ratio | 12.5:1 | 18.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 238 km/hour | 212 km/hour |
| Acceleration 0-100mph | 8 seconds | 9.7 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1690 kg | 1530 kg |
| Vehicle Length | 5070 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2650 mm |
| Fuel Consumption Overall | 8.3 L/100km | 5.7 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
