Audi S and RS models
…enhanced "sport" performance. Production of Audi "S" cars began in 1990 with the S2 Coupé, whilst the first "RS" car appeared four years later with the Audi RS 2 Avant. Today's S and RS models are based on the A/e-tron GT/Q models with the same number (e.g. S4/RS 4 is based on the A4 or the RS Q3 based on the Q3), but…