We've written about the Audi A3 vs S3 and the Audi A4 vs S4, so we figured we should tackle Audi's executive luxury sedan: the Audi A7 vs S7. The Audi A7 and S7 are classified as Audi's executive luxury coupe cars. The A7 is the standard sedan, while the S7 is the sport variant of the A7. Given the S7 is built off of the A7, there aren't very many differences between the two. … [Read more...] about Audi A7 vs Audi S7: Performance, Tuning, and Reliability