Triumph TR4 Chassis no: CT 22578 O engine no: CT 22125 E Reg:YDU-12C (ACT) Expires 13/04/2007The first step in the TRs transition from rugged sports car to something more refined, the TR4 was introduced in 1961, Michelotti's new bodyshell brought the styling up to date while beneath the skin there area number of changes