The 2012 Porsche Boxster is available as a 2-door, 2-seat convertible. Starting at $48,100, the 2012 Porsche Boxster Base is powered by a 2.9L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway. The top of the line 2012 Porsche Boxster Black Edition, priced at $65,200, is powered by a 3.4L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway.