FWIW the 28i has 330mm front discs vs the 20i 300mm front discs..not earth shattering..that's the only material difference, bar the different ECU map..Hi there. Yes, I believe it is ~245bhp as opposed to something like 185bhp for the 20i. That's the only difference I recall or even understood. I love driving and appreciate a nice-looking car, but I have no actual knowledge of them or their workings. Sorry
I was not looking for a 28i; it was the best specimen of Z4 I saw before impulse and impatience got the better of me!
