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Nissan builds a 400-hp engine small enough to fit in carry-on luggage

The era of tiny turbocharged engines has already brought out not just twin-turbo pickups and three-cylinder cars but more interesting race cars, from Formula 1 to the drag strip. Today, Nissan unveiled a new pinnacle of engine shrinkage: a three-cylinder turbo engine small enough to qualify as carry-on luggage that's capable of 400 hp.