I have a Z4 M roadster, absolutely ZERO in common with your description. What did you drive, a 2.5, 3.0? The "M" roadster is a monster............ 2/10s of a second slower around the Top Gear track than the Gallardo........... Stig at the wheel both cars. I wouldn't trade mine for anything short of a Lambo or Ferrari spider. Add Euro headers and a tune and it jumps to about 375HP.