can't say anything about the pressure - both cars were on the sales lot of a local BMW dealer, so i would hope that the pressures are up to specs...

that is the enigma - i know that 335 has MORE power but somehow on the road i did not feel it... granted, i got off the 4.8iS, got into 328, and then into 335... maybe that is subjective? did not feel that way while test driving...

also, i see that the 3-series in that year is made at various plants in germany... are there any specific plants i should avoid/or seek out?..
the 2011 spec sheets list 4 different flavors of 328i and 4 flavors of 328xi, besides obvious auto and manual... they are designated as pk53 or pk73 or something like that, and some are plain, some are SULEV... what the heck???? i have a list of those designations, if you guys want to see them...