The Variobahn, formerly known as the Variotram, is a German-designed articulated low-floor tram model. Since its introduction in 1993, the Variobahn has been manufactured variously by ABB, Adtranz, Bombardier Transportation, and since 2001 by Stadler Rail. As of 2009, 254 trams have been ordered, with an additional 110 on option. A unit costs about €2.5 million.
Operators include the Graz Holding, the Bergen Light Rail, the Chemnitz Tramway, Verkehrsverbund Rhein-Ruhr, the Helsinki Tramway, the Rhine Neckar Area Tramway, London Tramlink and the Sydney light rail network.
The Variotram was first developed by ABB Asea Brown Boveri at Henschel and a prototype was launched in 1993 for the Chemnitz tramway in Germany, operated by Chemnitzer Verkehrs-Aktiengesellschaft (CVAG). The serial delivery, with minor modifications, was made between 1998 and 2001—bringing the total number of units for Chemnitz to thirty. Of these, twenty-four were operated by CVAG and six by City-Bahn Chemnitz. In 1995, ABB's train division merged to become Adtranz. One prototype the following year sold to the Duisburg Stadtbahn, but serial production was never initiated for Duisburg.
In 1996, six trams were delivered to serve on the light rail between Mannheim, Heidelberg and Weinheim, Germany, operated by Oberrheinischen Eisenbahn-Gesellschaft. From 2001 to 2007, it ordered additional 20 trams. These were supplemented in 2002 by 8 trams for the Heidelberg Tramway, and in 2001–07 by 16 trams for the Mannheim Tramway. In 1996 the Sydney light rail system, in Australia, took delivery of seven trams, which were built in Dandenong, Victoria. All were withdrawn by mid 2015 and the remaining 6 put up for sale.