- Three-litre V6 unit generates 245 kW
- Acceleration from 0 to 100 km/h in 5.1 seconds
- Average fuel consumption of just 9.7 litres
Ingolstadt ... Audi is introducing its new sporty top models in the midsize
class – the S4 and the S4 Avant. Their engine, a three-litre V6 with
direct fuel injection and mechanical turbo charging, delivers a powerful 245 kW.
It accelerates the S4 to 100 km/h in just 5.1 seconds, but on average only uses
9.7 litres of fuel per 100 km. The quattro permanent all-wheel drive system
transfers its power to the road in style, which is then converted by the sport
suspension into dynamic handling.
Upon request, Audi can equip the new S4 and S4 Avant with innovative
technologies that further increase their lead over the competition. The
seven-speed S tronic changes gears with lightning speed, and the new sport
differential distributes the torque as needed between the rear wheels. The new
Audi S4 will be unveiled to the public for the first time at the Paris Auto Show
from October 2 to 19.
The heart of the new S4 and S4 Avant is a completely redesigned engine. The
3.0 TFSI, the newest member of the Audi V-engine family, is an outstanding
example of how the brand with the four rings blends performance and efficiency.
The V6 generates its power from a displacement of 2,995 cc, is equipped with
a supercharger, and delivers 245 kW. The sedan sprints to100 km/h in just 5.1
seconds, and the Avant in 5.2 seconds: they both have an electronically governed
top speed of 250 km/h.
The “T” in the 3.0’s TFSI nomenclature no longer merely stands for “turbo”,
but rather for the concept of supercharging in general – extensive testing on
the big V6 has proven the superiority of mechanical charging. In conjunction
with direct injection it is far superior to twin turbochargers, both in terms of
packaging and of starting performance and responsiveness.
The compressor is so compact that it easily fits inside the 90-degree V of
the cylinder banks, in place of the intake manifold. Two four-vane rotary
pistons counter-rotate inside the turbocharger at up to 23,000 rpm. Two
charge-air coolers are integrated into the housing and are connected to a
separate coolant circuit. An impressive array of measures keeps the noise
generated by the compressor to a minimum.
The engine-driven belt that powers the mechanical charger provides full
thrust right from idling speed. The 3.0 TFSI delivers its maximum 440 Nm at
2,500 rpm and maintains this constantly until 4,850 rpm. In fourth gear, the
vehicle accelerates from 80 to 120 km/h in just 4.4 seconds. Thanks to the
extremely short gas paths, the sonorous, supercharged V6 responds spontaneously
to the throttle, even more so than a naturally aspirated engine of the same
displacement.
Furthermore, the new 3.0 TFSI achieves exemplary fuel efficiency. On average,
the sedan uses 9.7 litres of fuel per 100 km, and the Avant 9.9 litres per 100
km – an improvement of 3.4 litres (26 percent) compared with its predecessor.
The Audi technology of gasoline direct injection was what made this great
efficiency possible in the first place.
Unlike conventional concepts, it allows the compressor to be located behind
the throttle valve. In view of the low density of the intake air at loads below
supercharging level and when coasting, its rotors are free-running and the
amount of power required to drive them is low.
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