2004 Audi A4 vs. 2009 Audi A6
To start off, 2009 Audi A6 is newer by 5 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 2,995 cc (6 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (300 HP @ 5100 RPM) has 163 more horse power than 2004 Audi A4. (137 HP @ 4000 RPM) In normal driving conditions, 2009 Audi A6 should accelerate faster than 2004 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi A4 weights approximately 587 kg more than 2009 Audi A6.
Because 2009 Audi A6 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, 2009 Audi A6 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, 2009 Audi A6 (420 Nm @ 2500 RPM) has 110 more torque (in Nm) than 2004 Audi A4. (310 Nm @ 1740 RPM). This means 2009 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi A4.
Compare all specifications:
| 2004 Audi A4 | 2009 Audi A6 | |
| Make | Audi | Audi |
| Model | A4 | A6 |
| Year Released | 2004 | 2009 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1968 cc | 2995 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 137 HP | 300 HP |
| Engine RPM | 4000 RPM | 5100 RPM |
| Torque | 310 Nm | 420 Nm |
| Torque RPM | 1740 RPM | 2500 RPM |
| Engine Compression Ratio | 18.0:1 | 18.0:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | 4WD |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1482 kg | 895 kg |
| Vehicle Length | 4590 mm | 4930 mm |
| Vehicle Width | 1780 mm | 2040 mm |
| Vehicle Height | 1430 mm | 1460 mm |
| Wheelbase Size | 2580 mm | 2850 mm |
| Fuel Consumption | 4.7 L/100km | 9.1 L/100km |
| Fuel Consumption City | 7.7 L/100km | 13.1 L/100km |
| Fuel Consumption Overall | 5.8 L/100km | 11.2 L/100km |
| Fuel Tank Capacity | 70 L | 80 L |
