2004 Audi A4 vs. 2008 Audi A8
To start off, 2008 Audi A8 is newer by 4 year(s). Which means there will be less support and parts availability for 2004 Audi A4. In addition, the cost of maintenance, including insurance, on 2004 Audi A4 would be higher. At 2,976 cc (6 cylinders), 2004 Audi A4 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (231 HP @ 4000 RPM) has 11 more horse power than 2004 Audi A4. (220 HP @ 6200 RPM) In normal driving conditions, 2008 Audi A8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Audi A8 weights approximately 60 kg more than 2004 Audi A4. 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, 2008 Audi A8 (450 Nm) has 140 more torque (in Nm) than 2004 Audi A4. (310 Nm). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4.
Compare all specifications:
| 2004 Audi A4 | 2008 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2004 | 2008 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2976 cc | 2967 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 220 HP | 231 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 310 Nm | 450 Nm |
| Engine Compression Ratio | 10.1:1 | 17.0:1 |
| Drive Type | 4WD | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1770 kg | 1830 kg |
| Vehicle Length | 4580 mm | 5060 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2950 mm |
| Fuel Consumption Overall | 11.2 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 63 L | 90 L |
