I have a 2016 Black Edition Plus 2.0 TDI Quattro 190. It is a manual so mpg might be slightly different. I get around 38mpg around town and 54mpg on motor way runs.
is it that simple though? it's not normal for a car to be using more fuel on a lower capacity engine than the larger oneThe A5 is a well made car so quite heavy. A 2.0l engine works hard to pull the car. The 3.0l works much less hard so drinks less and drives better. Simple