From 1974 onwards, Steinmetz also offered a road version of the Jumbo which, apart from the rear spoiler, was limited to engine tuning. The car had a 3.4 liter 6-cylinder engine equipped with 3 40mm Solex double carburettors. The power was stated as 208 hp at 5,400 rpm.
Fender flares and a 5-speed ZF transmission were available as options.

Unfortunately, the number of units delivered is not known.