1999 Audi A4 vs. 2009 Audi A6
To start off, 2009 Audi A6 is newer by 10 year(s). Which means there will be less support and parts availability for 1999 Audi A4. In addition, the cost of maintenance, including insurance, on 1999 Audi A4 would be higher. At 3,121 cc (6 cylinders), 2009 Audi A6 is equipped with a bigger engine. In terms of performance, 2009 Audi A6 (255 HP @ 6500 RPM) has 8 more horse power than 1999 Audi A4. (247 HP @ 4150 RPM) In normal driving conditions, 2009 Audi A6 should accelerate faster than 1999 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A6 weights approximately 205 kg more than 1999 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 (330 Nm @ 3250 RPM) has 9 more torque (in Nm) than 1999 Audi A4. (321 Nm @ 1900 RPM). This means 2009 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1999 Audi A4.
Compare all specifications:
| 1999 Audi A4 | 2009 Audi A6 | |
| Make | Audi | Audi |
| Model | A4 | A6 |
| Year Released | 1999 | 2009 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1896 cc | 3121 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 247 HP | 255 HP |
| Engine RPM | 4150 RPM | 6500 RPM |
| Torque | 321 Nm | 330 Nm |
| Torque RPM | 1900 RPM | 3250 RPM |
| Engine Bore Size | 79.5 mm | 84.5 mm |
| Engine Stroke Size | 95.5 mm | 92.8 mm |
| Fuel Type | Diesel | Gasoline |
| Acceleration 0-100mph | 12.8 seconds | 6.9 seconds |
| Drive Type | Front | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1335 kg | 1540 kg |
| Vehicle Length | 4480 mm | 4930 mm |
| Vehicle Width | 1740 mm | 2040 mm |
| Vehicle Height | 1420 mm | 1460 mm |
| Wheelbase Size | 2630 mm | 2850 mm |
| Fuel Tank Capacity | 62 L | 80 L |
