2005 Audi A4 vs. 2009 Audi A6
To start off, 2009 Audi A6 is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi A4. In addition, the cost of maintenance, including insurance, on 2005 Audi A4 would be higher. At 2,698 cc (6 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (178 HP @ 3300 RPM) has 17 more horse power than 2005 Audi A4. (161 HP @ 4000 RPM) In normal driving conditions, 2009 Audi A6 should accelerate faster than 2005 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A6 weights approximately 145 kg more than 2005 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than 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, 2009 Audi A6 (380 Nm @ 1400 RPM) has 30 more torque (in Nm) than 2005 Audi A4. (350 Nm @ 1500 RPM). This means 2009 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi A4.
Compare all specifications:
| 2005 Audi A4 | 2009 Audi A6 | |
| Make | Audi | Audi |
| Model | A4 | A6 |
| Year Released | 2005 | 2009 |
| Body Type | Station Wagon | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 2698 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 161 HP | 178 HP |
| Engine RPM | 4000 RPM | 3300 RPM |
| Torque | 350 Nm | 380 Nm |
| Torque RPM | 1500 RPM | 1400 RPM |
| Engine Compression Ratio | 18.0:1 | 17.0:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 225 km/hour | 220 km/hour |
| Acceleration 0-100mph | 9.1 seconds | 8.3 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1625 kg | 1770 kg |
| Vehicle Length | 4550 mm | 4940 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1430 mm | 1470 mm |
| Wheelbase Size | 2660 mm | 2850 mm |
| Fuel Consumption Overall | 7.2 L/100km | 7.2 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
