The noise really is a subjective measurement, as I have noted. My wife is used to drive the library-quiet V8 545i, so she noticed the increased noise right away. I however, drive the 318 4-banger on my short daily-commute, felt that it was acceptable.
MY05 545i SMG, sport-pack, L7, comfort seats, Navigation, Auburn Dakota leather/Jet Black. Euro-delivery.[COLOR=Navy]
1998 318Ti M-Pack Hellrot Red, 5 Speed.
2013 Jet Black X1 ED October pick up.