One more thing: I know I may catch some flack for sounding old school because this turbo 4 will be more powerful than the 230 HP N52 and turbos are back in vogue again, but for me, it's not all about raw speed for the dollar -- it's about driving enjoyment. Even if the turbo 4 represents technical progress, I don't think the turbo 4 is better because it probably doesn't sound as good, feel as good, rev as freely, etc. It's Quality vs. Quantity, and I'll take the former.
To me, a turbo 4 is just like a semi-automatic / dual-clutch transmission -- yes, it's faster, more efficient and it can help you post faster lap times, but I'll still buy a manual as long as I can because I enjoy them so much more.
If BMW ditches the NA inline 6 in favor of a turbo 4, that's only one step shy of ditching the manual transmission in favor of an automatic my book. Of course, that's probably coming soon anyhow...
