The Mercedes-Benz T80 is a six-wheeled vehicle built by Mercedes-Benz, developed and designed by Ferdinand Porsche in the late 1930s. It was intended to break the world land speed record, but never made the attempt, due to the project having been overtaken by the outbreak of World War II.

The Daimler-Benz DB 603 was a German aircraft engine used during World War II. It was a liquid-cooled 12-cylinder inverted V12 enlargement of the 33.9 Liter DB 601, which was in itself a development of the DB 600. Production of the DB 603 commenced in May 1942, and with a 44.5 liter displacement figure, was the largest displacement inverted V12 aviation engine to be produced and used in front line aircraft of the Third Reich during World War II.