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 4,170 cc (8 cylinders), 2005 Audi A8 is equipped with a bigger engine. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 265 kg more than 2008 Audi A4.
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, 2005 Audi A8 (430 Nm @ 3500 RPM) has 59 more torque (in Nm) than 2008 Audi A4. (371 Nm @ 1500 RPM). 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 | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2496 cc | 4170 cc |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 0 HP | 330 HP |
| Torque | 371 Nm | 430 Nm |
| Torque RPM | 1500 RPM | 3500 RPM |
| Engine Bore Size | 78.3 mm | 84.5 mm |
| Engine Stroke Size | 86.4 mm | 93 mm |
| Fuel Type | Diesel | Gasoline - Premium |
| Top Speed | 225 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.6 seconds | 6.3 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1590 kg | 1855 kg |
| Vehicle Length | 4180 mm | 5060 mm |
| Vehicle Height | 1370 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2770 mm |
| Fuel Consumption Overall | 7.8 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 66 L | 90 L |
