Quote:
Originally Posted by 03BeastCharmer
Wait for a coupe if you want to track with the BMW CCA, and in general it's better to have a coupe if you want to track. The coupe may be slower on track than your E90 M3, but with all the feedback and small size it's sooooo much fun!!
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In a perfect world, I would have an M coupe to complement my SI roadster. But alas, that is likely never to happen.
Re torsional stiffness, here is a quote from page 45 of BMW Z4, Design, Development and Production, by David Lightfoot:
"While the torsional stiffness of the Z3 had been 5,600 Nm, the Z4 achieves 14,500 Nm. That's two and one half times better without adding weight; a phenomenal achievement. The importance this development had on dynamic capabilities is hard to overstate. To provide perspective on the rate of technological change BMW has achieved, in 1990, the 8 Series, BMWs expensive technological tour de force coupe, was rated at 11,000 Nm. This was a a closed car and the best BMW had ever achieved in a coupe!"