Question: The Audi RS4 quattro is the top tier and highest performing version of some specific generations of the Audi A4 range of automobiles, it slots distinctly above which high performance variant of Audi's compact executive car A4, and was the original Audi S4, built from 1991 until 1994?
Sentence (from "Audi S4"): All subsequent S4s since 1997 have been based on the Audi A4; and as the A4 has evolved from one generation to the next, so has the S4.
Relevant evidence: No