ATLANTA, June 17, 2019 /PRNewswire/ -- Developed by the Porsche Motorsport department, the 2020 Porsche 718 Cayman GT4 and 718 Spyder represent the most powerful and engaging variants of the 718 line-up yet created. Offering a blend of pure, unfiltered driver's car character and track-oriented performance, both models are powered by a new 4.0-liter naturally-aspirated flat-six engine developing ATLANTA, June 17, 2019 /PRNewswire/ -- Developed by the Porsche Motorsport department, the 2020 Porsche 718 Cayman GT4 and 718 Spyder represent the most powerful and engaging variants of the 718 line-up yet created. Offering a blend of pure, unfiltered driver's car character and track-oriented performance, both models are powered by a new 4.0-liter naturally-aspirated flat-six engine developing