The 2009 Pontiac Solstice is available as a 2-door, 2-seat convertible. Starting at $24,275, the 2009 Pontiac Solstice Base Convertible is powered by a 2.4L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 25-mpg on the highway. The top of the line 2009PontiacSolsticeStreet Edition Convertible , priced at $ 29,410 , is powered by a 2.4L , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 25-mpg on the highway.