In 1951, the Waggonfabrik Wismar had built the modern VT 92 diesel railcar, which had space above one of the two bogies for a modern, high-speed diesel engine with 800 or 1,000 hp and a top speed of 120 km/h. The new, rounded head shape earned it the nickname “egghead” and characterized the diesel railcars of the Bundesbahn in the 1950s. While the single-car VT 92 still had a cab at both ends and the rounded head shape, multi-car multiple units of the class VT 085 with a similar design were soon being built.