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"         Quattro is more than just Audi nomenclature for all-wheel-drive technology; it is the performance arm of the company bearing the four-ring logo. As the General Manager of Quattro, Stephan Reil is responsible for overseeing the development of Audi&amp;#039;s coveted RS line and customer racing program.                  How does Quattro select which models will receive the RS treatment?          Every RS model has to make its own business case. The Audi RS 4, RS 5 and RS 6 are several generations in and are our main volume models. Therefore, we looked into developing the second-generation TT as a RS model for the first time as part of our product strategy growth.                           The new S6 and S7 are equipped with twin-turbochargedV-8s, yet the A6 and A7 utilize superchargers. Is there a reason for the differing forced induction?          We select the type of induction based on the character that suits each car best. The supercharger has the advantage in take-off performance and is therefore used in the luxury-oriented A6 and A7 models.                           It&amp;#039;s no secret Audis are tested heavily at the Nordschleife.Has an RS product other than the R8 broken the 8-minute barrier? Is it a target?          Every project of Quattro GmbH has to run an 8000-km (4971-mile) durability test on the Nordschleife. The 8-minute barrier is just a number. The R8 GT is well under it at around 7:30 and the RS 5 and TT RS both run around 8 minutes, although a TT RS equipped with aggressive tires is able to reach the 7:50s. That said, single lap times are not the main objective. Our target is to develop a car that outperforms its competitors.                           With a big push into customer racing with the R8 LMS and race-prepped TT RS, how will that affect Quattro&amp;#039;s future, technically?          There is no better way to test new technical solutions than in racing. An example of this would be the lightweight technology now used in production.                           With ever-more-stringent CAFE standards, how will the RS line adapt?          Fuel efficiency is a major goal for RS cars. By improving combustion and reducing the internal friction of the 4.2-liter V-8 in the RS 4 and RS 5, as well as the introduction of power recuperation, output went up by 30 horsepower and fuel efficiency improved by nearly 30 percent. Besides engine development, drivetrain efficiency and lighter weight play into this.     "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/car-culture/interviews/a17787/5-questions-with-stephan-reil/>