R83 may refer to: * HMS Ulster (R83), U-class destroyer of the British Royal Navy that saw service during World War II * R83 (New York City Subway car), a proposed subway car that would have been built for the New York City Subway * R-83 Muhldorf, a town in Bavaria, Germany, and the capital of the district Mühldorf on the river Inn * Romano R.83, a prototype single-seat French floatplane fighter of the 1930s This disambiguation page lists articles associated with the same title formed as a letter-number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article.