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.