The 230i is suppose to make more power than the 228, but when I look at the transmission ... at least in the auto, it looks like the 228 is going to be quicker, especially being it's also about a 100 lbs lighter.
Here's why I say this...
http://www.thecarconnection.com/car-...58133,40053749
Look at the final drive ratios
230i - 2.81
228i - 3.08
Now look at all the transmission gears... See... I'm guessing the extra power the B46 makes isn't enough to over come the gearing advantage of the 228i cars with the N20.
Has anyone taken both to the track to see how they compare?