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 2,966 cc (6 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (229 HP @ 4000 RPM) has 52 more horse power than 2005 Audi A4. (177 HP @ 1500 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. 2005 Audi A4 weights approximately 660 kg more than 2009 Audi A6.
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, 2009 Audi A6 (450 Nm @ 1400 RPM) has 80 more torque (in Nm) than 2005 Audi A4. (370 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 | 2966 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 177 HP | 229 HP |
| Engine RPM | 1500 RPM | 4000 RPM |
| Torque | 370 Nm | 450 Nm |
| Torque RPM | 1500 RPM | 1400 RPM |
| Engine Bore Size | 78.3 mm | 83 mm |
| Engine Stroke Size | 86.4 mm | 91.4 mm |
| Engine Compression Ratio | 18.5:1 | 17.0:1 |
| Fuel Type | Diesel | Diesel |
| Top Speed | 212 km/hour | 242 km/hour |
| Acceleration 0-100mph | 9 seconds | 7.4 seconds |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 5 doors |
| Vehicle Weight | 1590 kg | 930 kg |
| Vehicle Length | 4550 mm | 4940 mm |
| Vehicle Width | 1770 mm | 1470 mm |
| Vehicle Height | 1430 mm | 1860 mm |
| Wheelbase Size | 2580 mm | 2850 mm |
| Fuel Consumption Overall | 7.8 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 66 L | 70 L |
