2015 was a busy year for Porsche. The carmaker added the performance GTS trim to the 911 lineup, while tacking on a parking camera and sensors to the Boxster. The Cayenne now boasted a new turbo V6 model, which replaced the turbo V8, as well as a new hybrid model. It also received an updated suspension system, a new parking camera and ventilated rear seating. A beefy GT4 debuted in the Cayman lineup, offering a six-speed transmission and more horsepower found in a larger engine. Lastly, the long-awaited 918 Spyder hybrid supercar made its entrance.