Background
Simply constructed, practical to own and offering 100mph-plus performance at a bargain price, the Triumph TR2 was an enormous success both at home and abroad so it was only to be expected that its successor would represent evolution rather than revolution.
Introduced in October 1955, the TR3 was indeed little different from the TR2; changes to the Standard Vanguard-derived 2.0-litre engine boosted power from 90 to 95bhp but the most obvious difference was the adoption of an 'egg box' radiator grille.
By mid-1956 the engine developed 100bhp courtesy of a new cylinder head; then, in August, Girling front disc brakes and the stronger Phase III Vanguard rear axle were standardised.
Cosmetically revised but mechanically indistinguishable, the 1958 TR3A added to the TR3 recipe a full-width front grille and such ‘luxuries’ as exterior door handles and a lockable version of the same for the boot lid.
The 3A also came with a properly provisioned tool-kit as standard (it had been optional on the TR3).
The formula worked well as Triumph shifted a very healthy 58,000 TR3As, making it the third best-selling model in the TR range behind the much later TR6 and TR7.







