Filed under: Spy Photos , Sedan , Audi , Luxury The evolution of any Audi is a study in subtlety. The evolution of the A8, even by Audi standards, has been especially delicate, going from brazen lozenge to the softly curved - and elegant - geometric form it is today. There is nothing sculpted about it, and perhaps the most notable styling element the entire time has been the sedan's gaping grille. Yet based on the teaser for and spy shots of the next version, it looks like the A8 i