1931 Duesenberg SJ Convertible Sedan Only one of five built, this 1931 Duesenberg designed by the Gordon Buebrig team, features a straight eight engine with double overhead cams, four values per cylinder and it is supercharged. This stately black Classic has participated in three national Duesenberg tours. The current owners have possessed the vehicle since 1977 and have thoroughly restored it to showroom condition. This Classic also received the "Best in Show Award" at the 2013 Forest Grove Concours, so it obviously remains a crowd-pleaser. The current owners state "With 320 horsepower, nothing in its era could touch a seriously driven Duesenberg!"