Polestar 5, with 884 hp, has Porsche in its sights

A new horsepower war is brewing among automakers, and this time the number of cylinders is not a factor. At the Goodwood Festival of Speed in England last week, Polestar, aiming directly at Porsche, fired the latest shot with a sleek, 884-hp four-door GT -- the Polestar 5.