The 3.0 TDI V6 engine was developed by Audi and introduced in 2003. It was designed to surpass the performance of the older 2.5 TDI and to address its weaknesses. Initially used in Audi and Volkswagen's higher-end models, it was later introduced in the Audi A4 B7 in 2004, marking its entry into the mid-range segment. In 2006, a related 2.7 TDI engine was launched, differentiated mainly by a sh...