New Delhi: Bollywood superstar Amitabh Bachchan is roaming around in a new Porsche Cayman in white colour.And the actor is so protective about it that nimbu-mirchi is seen hanging in front of his new car. Recently Big B arrived in this swanky car at the special screening of Ranveer Singh, Arjun Kapoor and Priyanka Chopra starrer Gunday. And not to mention all the eyes were at his new baby!