2008 Audi A8 vs. 2004 Audi A4
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 2,975 cc (6 cylinders), 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (217 HP @ 6300 RPM) has 89 more horse power than 2004 Audi A4. (128 HP @ 4000 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 185 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.
Because 2004 Audi A4 is four wheel drive (4WD), it will have significant more traction and grip than 2008 Audi A8. In wet, icy, snow, or gravel driving conditions, 2004 Audi A4 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, 2004 Audi A4 (320 Nm @ 1900 RPM) has 20 more torque (in Nm) than 2008 Audi A8. (300 Nm @ 8200 RPM). This means 2004 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 2008 Audi A8.
Compare all specifications:
| 2008 Audi A8 | 2004 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2008 | 2004 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2975 cc | 1896 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 2 valves |
| Horse Power | 217 HP | 128 HP |
| Engine RPM | 6300 RPM | 4000 RPM |
| Torque | 300 Nm | 320 Nm |
| Torque RPM | 8200 RPM | 1900 RPM |
| Engine Bore Size | 82.5 mm | 79.5 mm |
| Engine Stroke Size | 92.8 mm | 95.5 mm |
| Engine Compression Ratio | 11.0:1 | 19.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 245 km/hour | 205 km/hour |
| Acceleration 0-100mph | 7.9 seconds | 10.1 seconds |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1670 kg | 1485 kg |
| Vehicle Length | 5060 mm | 4550 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1450 mm | 1430 mm |
| Wheelbase Size | 2950 mm | 2660 mm |
| Fuel Consumption Overall | 9.6 L/100km | 6.4 L/100km |
| Fuel Tank Capacity | 90 L | 66 L |
