BBC F1 co-commentator David Coulthard is rendered speechless after getting the chance to drive a 2014 Williams at Silverstone. <br /> <br />First off Coulthard gets to drive Keke Rosberg's 1982 Williams while current driver Valtteri Bottas steps in to Damon Hill's 1996 title winning car. <br /> <br />Former Williams driver Coulthard says the power is amazing in the new car and describes the experience as being like a "magic carpet ride".
