I was out today in a BuMmerW Z3 with the 3.2 M Power Motor when a A 4 pulled into the left lane, I blipped the throttle, he blipped back, when the light turned green, my ears discovered it was not a 2.8 30v A4 but a 2.7 S4 (turbo noise) comfirmed by my eyes when I only saw the rear of his car and the S4 badge pulling away. Bill