2017 may be forever remembered as the year that Porsche went back to putting four-cylinder engines in its sports cars. According to reliable sources, the 2017 Porsche Cayman coupe will begin using horizontally-opposed, four-cylinder turbocharged engines in place of its normally-aspirated boxer-six-cylinder engines in mid-2016. These smaller boosted engines are expected to appear on the Cayman base trim at the very least. Countering that rumor are reports we’ve read of testers driving top-trim 2017 model-year Cayman GT4s equipped with six-cylinder engines. So Porsche may add the four-cylinder at the bottom of the line, switch mid-year, or possibly wait to add the new engines until the 2017 model year, and that’s about as much clarity as we can provide in a preview. Some see this four-cylinder turbo trend as worrying; others as a sign of the coming carpocalypse.