2015 Porsche 918 Spyder Track Test
![2015 Porsche 918 Spyder Track Test](//picolio.auto123.com/auto123-media/articles/2014/9/59047/porsche-918-spyder-2015_006en.jpg?scaledown=450)
Every so many years, Porsche launches a supercar that serves as a technological gene pool from which future products will draw. Today, the all-new Porsche 918 Spyder has debuted as the latest Stuttgart supercar that'll earn a place in the history books.