Background
Triumph’s TR range formed part of the backbone for Britain’s sports car industry. Together with Jaguar, Austin-Healey and MG, sporting Triumphs defined that dashing British roadster image that brought in so much useful American currency to our post-war economy. Triumph’s formula was simple enough: a torquey four-cylinder engine sourced from the Standard Vanguard and tuned to give 100mph performance, teamed with a sturdy chassis and pretty open-topped bodywork. The TR2, 3 and 3A had slot-in sidescreens instead of proper windows, and so required endless sunshine or hardy owners, but things changed significantly in 1961. The TR4 looked a generation more modern, with full-width styling by Giovanni Michelotti that didn’t change a huge amount through the TR4A and TR5, then evolved into the TR6. It featured wind-up windows in the doors, dashboard ventilation and a more capacious boot than the old side-screen TRs. Built from 1965 until 1967, the TR4a gained independent trailing arm and coil spring rear suspension and a stiffer chassis, giving a better ride comfort. It used the same 4 cylinder 2.2 but changes to the head meant it gained around 10% more power at 104 bhp and 179 Nm.







