Style, performance, sophistication is in a class of its own with this stunning audi a6. Interior and backseat space are also a bit better than in other rear-wheel-drive european sport sedans, and the interior appointments themselves stand out as more fashion-forward. Audi claims best-in-class fuel economy for the 2. 0t model, which achieves up to 24 mpg city, 34 highway. Advanced technology-whether for safety, information, or entertainment-is where the a6 really shines. The a6 is also ahead of the curve with its excellent mmi touch system, which includes a simplified interface and a scratch-pad controller that accepts input addresses by tracing individual letters. Meanwhile, the s6 remains a performance standout, with performance capable of propelling it to 60 mph in just 4. 8 seconds.