My car is the manual version so not entirely comparable. Very carefully driven it returned 40mpg from new. This has improved to 51 mpg at 11,000 miles. The mpg plummets on the motorway when i do 75mph or above. Wind noise can be heard but is not much of a problem, its tyre noise that is the issue for me. and this intrudes at 70mph upwards. On some motorway road surfaces it can drown out the radio totally. The 65mpg quoted in some figures is pure fallacy in such a blunt and heavy vehicle.