The 1-series has exactly the same dimensions inside up to the b-column. From that pov - invalid argument
. Oh btw: I'm 6'2" and have no problems in a 1-series or a 3-series (well, again, identical). And usually the 1-series has less weight to carry around with the same engine. In terms of options you'll find almost everything available in both cars. And at least over here, there is still a noticable price difference from 1 to 3-series. Don't get me wrong, I love the 3-series, but for me the 1 is the better choice.