2008 Audi S5 Preview – New York Auto Show: Ripping a page out of the Mercedes-Benz playbook, Audi is starting to give each of its models a massaged performance treatment that replaces the standard “A” prefix for each model with a much sexier “S” much the same way its home-country rival has been adding the AMG suffix to everything in its lineup. The Audi S5 that debuted at the 2007 New York Auto Show is the tuned and tweaked version of the stunning A5 coupe that hits U.S. shores this summer, equipped with a powerful V8 engine, sport tuned suspension, upgraded brakes, and other modifications designed to optimize performance. The Audi S5 goes on sale in June at about the same time that the A5 arrives in showrooms.