Volvo S60 Polestar Concept -- With 508 hp

Volvo S60 Polestar Concept -- With 508 hp   The 508-horsepower beast, built by Volvo's official performance partner, Polestar, is arguably the most glamorous and lightning-quick Volvo concept car ever made.   "This is Polestar's interpretation of the Volvo S60," says Christian Dahl, founder and CEO of Polestar. "It's a car developed with our own preferences in mind -- although we know they are also shared by active drivers."   Make no mistake, it is an exotic in its own right -- but with refinement and precise handling. All of this technology results in a more intense,