2008 Audi A4 vs. 2005 Audi A8
To start off, 2008 Audi A4 is newer by 3 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 (450 HP @ 6300 RPM) has 349 more horse power than 2008 Audi A4. (101 HP @ 5600 RPM) In normal driving conditions, 2005 Audi A8 should accelerate faster than 2008 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 795 kg more than 2008 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 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) has 412 more torque (in Nm) than 2008 Audi A4. (148 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A4.
Compare all specifications:
| 2008 Audi A4 | 2005 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2008 | 2005 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1595 cc | 5998 cc |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 101 HP | 450 HP |
| Engine RPM | 5600 RPM | 6300 RPM |
| Torque | 148 Nm | 560 Nm |
| Engine Bore Size | 81 mm | 84.1 mm |
| Engine Stroke Size | 77.4 mm | 90 mm |
| Engine Compression Ratio | 10.5:1 | 11.0:1 |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1350 kg | 2145 kg |
| Vehicle Length | 4550 mm | 5200 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1460 mm |
| Wheelbase Size | 2660 mm | 3080 mm |
| Fuel Consumption City | 10.9 L/100km | 15.7 L/100km |
| Fuel Consumption Overall | 7.9 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
