BMW says a fixed roof turns its ballistic Z4 M Roadster into a long-distance grand tourer called the Z4 M Coupe, which marks the return of the BMW’s first two-seater coupe for almost five years. Quicker than even the iconic M3, there’s no denying the M3-engined Z4 Coupe is far less compromised than its open-topped sibling – and its electrically-steered, run-flat tyred 3.0si stablemate. Throw in a $3300-lower pricetag that’s also $10,000 less than its controversially styled predecessor’s and on paper the Z4 M Coupe is almost too good to be true. But when you’ve got a compact two-seater sports coupe of the Porsche Cayman’s calibre to live up to, BMW’s cut-price super-coupe needs every advantage it can muster.