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 5,998 cc, 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (445 HP @ 6200 RPM) has 228 more horse power than 2004 Audi A4. (217 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 265 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 2008 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2004 Audi A4. In wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Audi A8 (580 Nm) has 280 more torque (in Nm) than 2004 Audi A4. (300 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:
| 2008 Audi A8 | 2004 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2008 | 2004 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 5998 cc | 2981 cc |
| Engine Type | W | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 445 HP | 217 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 580 Nm | 300 Nm |
| Engine Bore Size | 84 mm | 83 mm |
| Engine Stroke Size | 90.2 mm | 93 mm |
| Engine Compression Ratio | 11.0:1 | 10.1:1 |
| Drive Type | 4WD | Front |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1995 kg | 1730 kg |
| Vehicle Length | 5190 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1460 mm | 1400 mm |
| Wheelbase Size | 3080 mm | 2660 mm |
| Fuel Consumption Overall | 13.8 L/100km | 10.2 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
