Wk/end toy
335d - max power 370bhp ish
335i - max power 400BHP + loads,loads more!
335D -
Pros:
Torque that the i can only dream about,
Cons:
Crap sound,lack of tuning methods other than a remap,DPF removal,custom exhaust,Auto ONLY.
335i -
Pros:
BHP that the D can only dream about
audible soundtrack that the D will never ever achieve
cheaper to buy than the D (secondhand/new)
Multiple ways of tuning to achieve 500BHP+
Manual cars are far more fun,and more of an involving drive
Cons:
Arguably a less reliable car than the D
MPG on either car is an irrelevance,if economy is a concern buy a Nissan Micra
Verdict:
335i
beats the M3, as the i is so readily tuneable to surpass the performance of the M3 (not the chassis/drivability of the M3 though).