...I posted in Other Marques about the new Audi TT-RS it looks pretty production-ready to me, and is surely good news if they do decide to make it. There is no way BMW will be out-powered by the TT, and for me the 3.0 twin turbo hasn't proven to be reliable enough to push the power up any further, so that can only mean the 4.0 V8 from the M3 going into the Z4M.

Edit - Pics and info on page 6 here http://www.z4-forum.com/forum/viewtopic.php?p=139231#p139231

Edit - Pics and info on page 6 here http://www.z4-forum.com/forum/viewtopic.php?p=139231#p139231