Originally Posted by AW128i
And your latter point speaks to why you see seemingly exponentially more x28 cars around compared to x35 cars; most buyers could care less about what's under the hood as long as it's more than adequate, which the 3.0l I6 and 2.0T are.
Many would argue an NA engine (especially the BMW 3.0 I6, or the V8 in M3, or the V10 in M5) is the true form of a finely tuned and balanced engine, not some forced induction engine. The Audi 2.0T is not an NA engine, it is also a 4 banger which lacks the kind of smoothness and balance an I6 has.
In that sense the NA I6 in the 330i is a true state of art engine, not the one you find in a 335i. Unfortunately BMW no longer sells the high power NA I6, the one in the 328i is somewhat detuned, though better than the one in the 325i. Still many would say an NA I6 is a presentation of what the best engine one can build.
Anyone can slap a turbo or super charger on an engine and call it a day, in our case BMW isn't even too good at it given the HPFP issue, but to make the best out of an NA engine takes real talent.
You can of course argue all you want why a forced induction engine can be a true showing of talent, just don't go around tell those who like NA engines that they don't care what is under the hood.