P1 winter testing video: http://youtu.be/Hb_6pNFqqNA   The McLaren P1 is intended to be “the best driver’s car in the world on road and track,” the company says. Its price of $1.34 million buys a car equipped for road and track and “just” 375 cars will be built in the new production center in Woking, Surrey, UK, later this year. The company was testing its 903-horsepower, plug-in electric supercar in northern Sweden at the Arctic Circle....