A lot of fanfare greeted Audi when it presented the Audi S4 and the Audi S4 Avant – its sporty top models in the midsize class – back in 2008. Audi equipped these vehicles with a three-liter V6 engine with direct fuel injection and mechanical turbocharging, generating an impressive 245 kW (333 hp). With this engine, the Audi S4 was capable of going from zero to 100 km/h (62.14 mph) in only 5.1 seconds.
It uses just 9.7 liters of fuel per 100 km (24.25 US mpg) on average. It is equipped with a quattro permanent all-wheel drive system. Power is then converted by the sport suspension into dynamic handling. Audi accepted requests from its customers for the new Audi S4 and S4 Avant with regards to innovative technologies that made the vehicles superior over its rivals. Changing the gears on the seven-speed S tronic is accomplished with lightning speed.
In addition, the new sport differential is capable of distributing the torque when necessary between the rear wheels. The unveiling of the Audi S4 will be made on October 2 at the Paris Auto Show.
A totally redesigned engine was used on this Audi S4 and Audi S4 Avant. The 3.0 TFSI, a part of the Audi V-engine family, was cited as an exceptional case of how the brand can combine efficiency and performance.
The V6 can produce power from a displacement of 2,995 cc and generates 245 kW (333 hp) with the aid of a supercharger. The sedan can accelerate from zero to 100 km/h (62.14 mph) in only 5.1 seconds. Meanwhile, the Avant can make the sprint in 5.2 seconds. Both can achieve an electronically limited top speed of 250 km/h (155.34 mph).
No longer does the “T” 3.0's TFSI nomenclature stand for “turbo.” It actually refers generally to the concept of supercharging. Mechanical charging was able to prove its superiority after comprehensive tests were conducted on the big V6. With direct injection, it was deemed to be better than the twin turbochargers when it comes to packaging, responsiveness, and starting performance.
This represents an improvement of 3.4 liters (26%) compared with its predecessor. Its fuel efficiency is credited to Audi’s gasoline direct injection technology. It’s different from traditional concepts as it allows the compressor to be positioned behind the throttle valve. Considering the low density of the intake air at loads below supercharging level and during coasting, its rotors are free-running and only require a very low level of power to drive them.
The V6 power in the new Audi S4 and Audi S4 Avant then flows into a six-speed transmission, offered as standard. Shifting is quick and precise. Audi also offers the option of a technologically advanced dual-clutch transmission. The seven-speed S tronic is known to be very dynamic and highly efficient.
Furthermore, the driver can either choose to be in fully automatic mode or choose the gears with paddles on the steering wheel or directly with the shift lever. All of these choices offer very quick gearshifts. The gearshift is typical of Audi as it is precise, dynamic, and comfortable. The seven-speed S tronic is composed of two separate transmissions and makes use of two multidisk clutches that control the different gears.
The big K1 clutch guides the power through a solid shaft to the pinions for gears 1, 3, 5 and 7. A hollow shaft then rotates around the solid shaft. It is linked to the compact K2 clutch, which is built within its bigger counterpart and controls the pinions for gears 2, 4, 6 and reverse gear.