Hawker Siddeley RTC-85SP/D are diesel multiple units manufactured by Hawker Siddeley Canada for GO Transit, based on the H-series subway cars which they built for the Toronto Transit Commission. The 92-seat RTC cars were ordered and delivered to GO Transit in 1967 as single-level self-propelled units # D700, D701, D702 to D708 (later renumbered as 9825-9826, 9827-9833) with total order of 117 cars. All cars were built at Hawker's Thunder Bay, Ontario plant. In 1975 the cars were converted to cab cars by Ontario Northland Railway and some cars leased to MARC Train.