The Rolls-Royce Wraith is  based on the chassis of what car that was known as RR04 during development?
Rolls-Royce Wraith (2013): The Rolls-Royce Wraith is a British handmade 4 seat luxury grand tourer manufactured by Rolls-Royce Motor Cars and based on the chassis of the Rolls-Royce Ghost. Rolls-Royce Ghost:  During development, the Ghost was known as the "RR04".
Rolls-Royce Ghost