Which aircraft is newer Boeing 757 or airbus 320?

The first Boeing 757-200 rolled out in January of 1982 and made its first flight one month later. Whereas the Airbus A320 made its first flight in February of 1987. however Boeing just concluded the 23-year run of the 757 and ceased manufacturing them in November 2005. With exactly 1050 757-200's built and sold and over 1030 are still in service. On the other hand Airbus is still producing A320's and as of October 2011, they had sold 4,858, of which 4,765 are still in service.