Hurrah, you don’t need to sink money into a Cayman GT4 to get a flat-six engine. This is one of Porsche’s big hits; the Cayman GTS. After a solid four years of vouching for that grunty turbocharged four-cylinder in the 718 Cayman, Stuttgart has had a bit of an epiphany and done a U-turn. They've gone and plonk in a slightly detuned version of the latest Cayman GT4's 4.0-litre flat-six, and ...

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