Moved to a 2001 340da.from our 5 yrs. with a 2000 310da. Late in the season last year. Not a huge difference but there are some overall. Boats condition overall is good as far as I know. We had the surveys done but besides a couple small runs to the islands never really got to take her on long shake down cruise. The 8.1s have tons of power over the 5.7 . I do miss how quite at cruising speed the 310 was. It will be nice when I get the general normal feel for the 340.