2009 Audi A3 vs. 2005 Audi A8
To start off, 2009 Audi A3 is newer by 4 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 4,178 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (335 HP @ 4000 RPM) has 84 more horse power than 2009 Audi A3. (251 HP @ 6300 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 2009 Audi A3. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 490 kg more than 2009 Audi A3. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi A8 (430 Nm) has 110 more torque (in Nm) than 2009 Audi A3. (320 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A3.
Compare all specifications:
| 2009 Audi A3 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | A3 | A8 |
| Year Released | 2009 | 2005 |
| Body Type | Hatchback | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3196 cc | 4178 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 251 HP | 335 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 320 Nm | 430 Nm |
| Engine Bore Size | 84 mm | 85 mm |
| Engine Stroke Size | 95.9 mm | 93 mm |
| Engine Compression Ratio | 11.3:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 3 doors | 4 doors |
| Vehicle Weight | 1455 kg | 1945 kg |
| Vehicle Length | 4290 mm | 5060 mm |
| Vehicle Width | 1970 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1450 mm |
| Wheelbase Size | 2580 mm | 2950 mm |
| Fuel Consumption | 8.4 L/100km | 9.8 L/100km |
| Fuel Consumption City | 11.2 L/100km | 13.1 L/100km |
| Fuel Consumption Overall | 9.8 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 55 L | 90 L |
