2008 Audi A5 vs. 2004 Audi A8
To start off, 2008 Audi A5 is newer by 4 year(s). Which means there will be less support and parts availability for 2004 Audi A8. In addition, the cost of maintenance, including insurance, on 2004 Audi A8 would be higher. At 5,998 cc, 2004 Audi A8 is equipped with a bigger engine. In terms of performance, 2004 Audi A8 (450 HP @ 6300 RPM) has 101 more horse power than 2008 Audi A5. (349 HP @ 7000 RPM) In normal driving conditions, 2004 Audi A8 should accelerate faster than 2008 Audi A5. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A8 weights approximately 365 kg more than 2008 Audi A5. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2004 Audi A8 (560 Nm @ 4000 RPM) has 120 more torque (in Nm) than 2008 Audi A5. (440 Nm @ 3500 RPM). This means 2004 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A5. 2004 Audi A8 has automatic transmission and 2008 Audi A5 has manual transmission. 2008 Audi A5 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi A5 | 2004 Audi A8 | |
| Make | Audi | Audi |
| Model | A5 | A8 |
| Year Released | 2008 | 2004 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 5998 cc |
| Engine Type | V | W |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 349 HP | 450 HP |
| Engine RPM | 7000 RPM | 6300 RPM |
| Torque | 440 Nm | 560 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 84.5 mm | 84.1 mm |
| Engine Stroke Size | 93 mm | 90.2 mm |
| Engine Compression Ratio | 10.3:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1630 kg | 1995 kg |
| Vehicle Length | 4640 mm | 5060 mm |
| Vehicle Width | 1860 mm | 1900 mm |
| Vehicle Height | 1380 mm | 1450 mm |
| Wheelbase Size | 2760 mm | 2950 mm |
