This is a pre-production Ford Focus RS which is making the rounds doing media events. Photos are from an event in Detroit and the video is of the same car in New York!
The Focus RS is an all-wheel-drive 325 horsepower rocket and uses the turbocharged 2.3-liter EcoBoost four-cylinder engine from the new Mustang albeit quite modified.
You can expect the car to go on sale next year but Ford is being tight-lipped about the whole thing. For now check out the video and that exhaust note.