Although the Type 44 chassis would live on in the D11 V8 quattro until 1994 (albeit heavily revised), for many the pinnacle of the chassis was the 1991 model year. It was then that finally the U.S. market received the power that Europeans had enjoyed in the chassis for so long. Audi used its Group B, Sport Quattro and IMSA experience to create a four valve head for their road cars. It was utilized in many chassis in slightly different configurations; the U.S. market 200 and early S models received the 3B, while the Quattro had a slightly upgraded RR motor. With mild revisions, this motor was again offered in AAN configuration for the 1992 model year, while Europeans had the ABY. The final development was the RS2’s ADU, but all of these motors shared the same inline-5, 20V turbo construction – and all are very highly sought. For U.S. customers, though, since the S2 and RS2 models were never offered along with the late 20V Quattros, it doesn’t get much better if you like the older cars than the 1991 200, and then again doesn’t get much better in 200s than a clean Avant:
