Slipping behind the wheel of the Tesla Model S is like crossing into a promising zero-emissions future. This electric luxury sports car, built by a small automaker based in Palo Alto, Calif., is brimming with innovation, delivers world-class performance, and is interwoven throughout with impressive attention to detail. It’s what Marty McFly might have brought back in place of his DeLorean in  “Back to the Future.” The sum total of that effort has earned the Model S the highest score in our Ratings: 99 out of  100. That is far ahead of such direct competitors as the gas-powered Porsche Panamera (84) and the Fisker Karma plug-in hybrid (57). Read it at CR