Even as Porsche moves toward electrification across its line, the German automaker keeps ratcheting up the performance from its gas-fueled sports cars. The recently revealed 718 Spyder RS becomes the ultimate rendition of the Porsche Boxster and arrives next spring. The Spyder RS is basically the open version of the 718 Cayman GT4 RS available now. Both of these incredible mid-engine cars use a 493-hp naturally aspirated six-cylinder engine from the 911 GT3