1955 – 1957 Similar specs to the Triumph TR2 apart from being fitted with an egg-box front grille and larger S.U. carburettors.
The most significant changes occurred in 1956, when the engine output was boosted to 100 bhp and shortly after, the TR3 became the worlds first production car to install front disc brakes.
*However, Australian “CKD assembled” TR3s were fitted as standard with drum brakes all round, and did not have disc brakes.