Audi's A6 and S6 earn a 5-star safety rating from the NHTSA.
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When Audi launched the R8, a racecar turned production vehicle in 2006, company execs knew customers would want it.
Audi is about to create a slew of new models, particularly SUVs.
Most car buffs are familiar with the gargling from a Ford Mustang's V-8.