Quote:
Originally Posted by BiscottiGelato
The sDrive35i Z4 have the same engine as the 135i and I think it's heavier than the 135i? If the 135i is only competitive with the Cayman, then I don't see how the Z4 will be competitive to the Boxster S...
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It is not just the weight difference that comes into play. The '09 Z4 has a lower centre of gravity, different suspension set up, stiffer chassis (I presume dont know exact figures), steering etc that would, I am certain, add up to greater cornering speed than the 135i in stock form. I would venture to say that a z4 35i would be faster around BMW's test track than a 135i.
Hence it could well be competitive in this regard to a Boxster S.
One thing the 135i would have an advantage in is its awesome 6-pot brakes. But who knows how effective the new Z4's braking system actually is yet?