The combination of the Audi Quattro's turbocharged engine and 4x4 drive train meant there was nothing else like it in the 1980s. The car developed into a formidable rally car. There were snags but Audi ironed these out over the years. Later Audi models using the 4x4 drive train took on the name quattro with a small initial letter. Here the articles cover the introduction, road tests, rally car tests, performance and technical data, comparison tests and buying secondhand. Models covered are: LHD, Series 1, Series 2, Rally Quattro, Treser, 80 Quattro, Treser roadster, Sport Quattro, 20v Quattro, S2.