BestEngine Overall: 2.0 TDI; The 2.0 TDI is one of the best Audi A6 diesel engines. It provides a fantastic balance for daily use, being just powerful enough for day-to-day traffic, fuel-efficient, and quiet! Best Engine For Reliability: 1.9 TDI; Many agree that the 1.9 TDI is the most reliable Audi A6 diesel engine, or for that matter, any
20tdi stuttering at certain rpm. I've had this problem for months now but it's only just started to annoy me, at about 1500 to 1600 rpm I get very slightly stutter which happens when cold and warm, it can be noticed in higher gears but is much more noticeable lower down, however it's not violent unless i get it at the right spot in 1st where
12March 2009 – DSG Dilemmas. Nudging 4000 miles now in the ludicrously over-specced Audi TT TDi and the chunky little grey-bomb is feeling nicely run-in. Initially, the power delivery felt too
DPFFailure. DPF failure is another common issue with vehicles powered by VAG 1.6 TDI engines. This may result in decreased engine performance, elevated emissions, and the check engine light. Warm & Cold Start Issues. Long cranking times, trouble starting when cold or warm and total failure to start. tojVmM.