Re: Crossfire MRX?
Fellow Audi driver here (2003 A6 2.7T MT6, chipped). The naturally aspirated Crossfire (identifiable by it's moving spoiler) is a 3.2l Mercedes Benz V6. Basically a vintage 1999-2000 SLK320 motor. The SRT6 (identifiable by the larger fixed spoiler) boasts the same engine, tweaked heavily by AMG, and outfitted with a supercharger.