The 2009 BMW 128 is available as a 2-door, 4-seat coupe. Starting at $34,000, the 2009 BMW 128 Convertible is powered by a 3.0L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 28-mpg on the highway. The top of the line 2009 BMW 128 w/SULEV Convertible, priced at $34,000, is powered by a 3.0L, 6-cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 28-mpg on the highway.