Excluding the Audi S6 and RS 6 models, the most powerful petrol engined Audi A6 is the 3.0 TFSI. It is powered by the 3.0-litre V6 producing 228 kW (310 hp) and 440 Nm. The FSI stands for gasoline direct injection, a technology in which fuel is injected directly into the combustion chambers rather than into the intake manifold in the traditional manner. This V6 engine is charged, but this time the T doesn’t stand for turbo. This can be a bit misleading because the 2.0 TFSI is turbocharged, but this 3.0 TFSI is actually supercharged. Audi is no newcomer with this technology as already in the 1930s, Audi’s predecessor, the Auto Union raced succesfully with supercharged Grand Prix cars.
The mechanical charger sits in the 90-degree V of the cylinder banks and is belt-driven by the crankshaft. Inside the so-called Roots blower, two rotary pistons similar to worm gears counter-rotate at over 20,000 rpm. The compressor is located downstream of the throttle valve. Its drive requires little engine power, as the density of the intake air is very low at loads below the supercharging level and when coasting. Torque develops early and quickly due to the short gas paths downstream of the supercharger. The top torque of 440 Newtom metres is available between 2,900 rpm and 4,500 rpm. The maximum power of 228 kW (310 hp) is delivered between 5,500 and 6,500 rpm.
The S tronic transmission and the quattro permanent four-wheel drive system help to put the power to the road. The seven-speed S tronic transmission works great with this powerful petrol engine. It offers D and S driving modes. The sportier S mode keeps the revs a bit higher so that the car is ready to accelerate immediately when you press the gas pedal a bit further. Audi A6 Avant 3.0 TFSI quattro S tronic can accelerate from zero to 100 km/h in 5,6 seconds. The top speed is 250 km/h. Perhaps even more important is the car’s performance when you need to overtake. With the huge torque of 440 Newton metres, the car build up speed unbelievably fast. You don’t need to spend a lot of time on the opposite side of the road.
The four-wheel drive is the most useful when you have challenging road or weather conditions, like rain or snow. The quattro system in the Audi A6 Avant typically sends 60 percent of its power to the rear axle and 40 to the front. If the driving conditions require, a maximum of 80 percent can be sent to the rear axle and 60 percent to the front. You might think that the air suspension isn’t the best choice if you want a sporty handling. Audi, however, has managed to setup the air suspension so that it is comfortable on a longer journey but at the same time keeps the body roll on a minimum level in tight bends.
The 3.0 TFSI has to be one of my favorite engines available for Audi A6 Avant. Only bad thing is that the powerful petrol engine isn’t very economical. The average fuel consumption is 10,8 l/100km and the CO2 emissions are 190 g/km. You can get the comsumption below ten litres if you drive nicely and be careful with the gas pedal, but who wants to do that when you have a 310 hp supercharged V6 under the bonnet. The 3.0 BiTDI diesel would be more economical and provides quite similar performance, but this petrol engine just feels some much more playful. So which one would I choose? I think I would drive home with this 3.0 TFSI.
- 228 kW (310 hp) / 5500-6500rpm
- 440 Nm / 2900-4500rpm
- 7-speed automatic
0-100km/h / 0-62mph
- 5.6 seconds
- 250 km/h
- 8.2 l/100km
- 190 g/km