2004 Audi A4 vs. 2007 Audi A8
To start off, 2007 Audi A8 is newer by 3 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 5,997 cc, 2007 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi A8 (444 HP @ 6200 RPM) has 274 more horse power than 2004 Audi A4. (170 HP @ 6500 RPM) In normal driving conditions, 2007 Audi A8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A8 weights approximately 345 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 2007 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, 2007 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, 2007 Audi A8 (580 Nm) has 345 more torque (in Nm) than 2004 Audi A4. (235 Nm). This means 2007 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 | 2007 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2004 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1784 cc | 5997 cc |
| Engine Type | in-line | W |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 170 HP | 444 HP |
| Engine RPM | 6500 RPM | 6200 RPM |
| Torque | 235 Nm | 580 Nm |
| Engine Bore Size | 81 mm | 84 mm |
| Engine Stroke Size | 86 mm | 90.2 mm |
| Engine Compression Ratio | 9.3:1 | 11.0:1 |
| Drive Type | Front | 4WD |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1650 kg | 1995 kg |
| Vehicle Length | 4580 mm | 5070 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1460 mm |
| Wheelbase Size | 2580 mm | 3080 mm |
| Fuel Consumption Overall | 9.1 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
