Stevens also modernized the Aero-Willys sedans that were sold in Brazil in the 1960s, restyled the front end of the Volkswagen 411 (which became the 412) and, although he didn’t design the original Oscar Meyer Wienermobile, he did redesign it. According to Adamson’s book, Stevens created “the classic shape…when commissioned to redesign it.” Before Stevens’ redesign, the Wienermobile was simply a hot dog riding on a Dodge chassis. Stevens put the Wienermobile on a Willys Jeep chassis and added a hot dog bun to the lower part of his design, transforming “the lower section into a sculptural form that was cast in sections. He also added a dramatic bubble cockpit to the front, creating a sense of space-age design.” Stevens also took credit for renaming it “Wienermobile,” as he felt the previous name “Wiener Wagon” was antiquated. His redesign was in use from 1958 to 1969, but Oscar Meyer later approached Stevens’ sons to build a new fleet of Wienermobiles that were in use from 1988 to 1995.
Stevens had such a love for cars that he even opened his own auto museum in Mequon, Wisconsin, in 1959. The museum included both vehicles of his own design and those that he admired. Again, according to Adamson’s book, Stevens’ auto museum contained a 1905 Cadillac one-cylinder roadster, a 1914 Marmon Wasp, a 1927 Hispano-Suiza town car, a 1930 L-29 Cord coupe, a 1939 Talbot Lago, a 1928 Mercedes phaeton, a 1954 Rolls Royce Silver Wraith town car, a 1948 Jeepster, a 1951 Kaiser, a 1961 Heli-bout, and the Studebaker prototypes of the mid-1960s. The museum closed in 1999, but photos from the museum can be seen at the links at the bottom of this Hemmings article.
Other transportation designs that Stevens is notable for are the Skytop Lounge observation cars for the Chicago, Milwaukee, St. Paul & Pacific Railroad’s Hiawatha passenger trains. With their distinctive glassed-in observation area, this design could be considered a precursor to what Stevens later created with the Jeep Wagoneer. The current nostalgia for vehicles that offer massive visibility is part of the reason for the meteoric rise in SJ values which, of course, was based on Stevens’ Wagoneer design. He also designed Outboard Marine Corp.’s Evinrude Lark and Johnson Javelin outboard motorboat series, the Cadillac Sea Lark, as well as boat designs for Owens Yacht Company, Cutter Boats, and the Vollrath Company.