Bristol Commercial Vehicles built the SU model from 1960 to 1966, this featured the same EN250 engine and BMC rear-axle as the Nimbus NS3AN with a David Brown overdrive-top five-speed constant-mesh gearbox, all were bodied by Eastern Coach Works, most to 25 ft (8m) length, seating 36 (buses) or 33 (coaches) although a shorter-wheelbase 30-seat model 23 feet long was also built.