2005 Audi A8 vs. 2004 Audi A4
To start off, 2005 Audi A8 is newer by 1 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, 2005 Audi A8 is equipped with a bigger engine. In terms of performance, 2005 Audi A8 (450 HP @ 6300 RPM) has 253 more horse power than 2004 Audi A4. (197 HP @ 5100 RPM). In normal driving conditions, 2005 Audi A8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A8 weights approximately 610 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, 2005 Audi A8 (560 Nm) has 280 more torque (in Nm) than 2004 Audi A4. (280 Nm). This means 2005 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4.
Compare all specifications:
| 2005 Audi A8 | 2004 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2005 | 2004 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5998 cc | 1984 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 197 HP |
| Engine RPM | 6300 RPM | 5100 RPM |
| Torque | 560 Nm | 280 Nm |
| Engine Bore Size | 84.1 mm | 82.5 mm |
| Engine Stroke Size | 90 mm | 92.8 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Drive Type | 4WD | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 2145 kg | 1535 kg |
| Vehicle Length | 5200 mm | 4590 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1460 mm | 1430 mm |
| Wheelbase Size | 3080 mm | 2470 mm |
| Fuel Consumption Highway | 11.2 L/100km | 7.4 L/100km |
| Fuel Consumption City | 15.7 L/100km | 13.3 L/100km |
| Fuel Consumption Overall | 13.8 L/100km | 9.6 L/100km |
| Fuel Tank Capacity | 90 L | 63 L |
