If you’ve ever wondered what would happen if Porsche stuffed the stupendous 4.0-litre, naturally aspirated, flat-six from the latest 911 GT3 into the back of its mid-engine baby-brother, the Cayman… the GT4 RS is your answer. This is Porsche’s GT department letting its hair down, saying ‘hold my Stein!’, and producing the car that we’ve all dreamed about, but never thought they’d have the nerve to put into production. Was it worth the gamble? Top Gear Magazine’s Editor Jack Rix strapped himself in on road and track to find out.

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