2009 Audi A4 vs. 2005 Audi A8
To start off, 2009 Audi A4 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 5,998 cc, 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (444 HP @ 6500 RPM) has 183 more horse power than 2009 Audi A4. (261 HP @ 6500 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 730 kg more than 2005 Audi A8.
Because 2005 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Audi A4. 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 (560 Nm @ 4000 RPM) has 230 more torque (in Nm) than 2009 Audi A4. (330 Nm @ 3000 RPM). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2005 Audi A8 has automatic transmission and 2009 Audi A4 has manual transmission. 2009 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2009 | 2005 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3197 cc | 5998 cc |
| Engine Type | V | W |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 261 HP | 444 HP |
| Engine RPM | 6500 RPM | 6500 RPM |
| Torque | 330 Nm | 560 Nm |
| Torque RPM | 3000 RPM | 4000 RPM |
| Engine Compression Ratio | 12.5:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 6.4 seconds | 5.2 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1630 kg | 900 kg |
| Vehicle Length | 4710 mm | 5190 mm |
| Vehicle Width | 1830 mm | 1900 mm |
| Vehicle Height | 1440 mm | 1460 mm |
| Wheelbase Size | 2810 mm | 3080 mm |
| Fuel Consumption Overall | 9.1 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 64 L | 90 L |
