2004 Audi A4 vs. 2006 Audi A8
To start off, 2006 Audi A8 is newer by 2 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 3,934 cc (8 cylinders), 2006 Audi A8 is equipped with a bigger engine. In terms of performance, 2006 Audi A8 (271 HP @ 3750 RPM) has 134 more horse power than 2004 Audi A4. (137 HP @ 4000 RPM) In normal driving conditions, 2006 Audi A8 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi A8 weights approximately 458 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 2006 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, 2006 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, 2006 Audi A8 (650 Nm @ 1800 RPM) has 340 more torque (in Nm) than 2004 Audi A4. (310 Nm @ 1740 RPM). This means 2006 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 | 2006 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2004 | 2006 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1968 cc | 3934 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 137 HP | 271 HP |
| Engine RPM | 4000 RPM | 3750 RPM |
| Torque | 310 Nm | 650 Nm |
| Torque RPM | 1740 RPM | 1800 RPM |
| Engine Bore Size | 81 mm | 81 mm |
| Engine Stroke Size | 95.5 mm | 95.5 mm |
| Engine Compression Ratio | 18.0:1 | 18.0:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 201 km/hour | 250 km/hour |
| Acceleration 0-100mph | 10.2 seconds | 6.8 seconds |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1482 kg | 1940 kg |
| Vehicle Length | 4590 mm | 5190 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1430 mm | 1460 mm |
| Wheelbase Size | 2580 mm | 3080 mm |
| Fuel Consumption Overall | 5.8 L/100km | 9.6 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
