^ It's not like the LSD and hydraulic steering haven't been invented yet. The M135i could be better using technology available right now, it's not the same as comparing the iPhone 3 to the latest technology.
But then you would be comparing a real M135i to a hypothetical M135i with LSD and hydraulic steering. What's the point when it doesn't exist? Makes no sense. The M135i got it's rating for what it is and not for what it could have been.