Background
Introduced in 1955, the TR3 was an evolution of Triumph’s 1953 TR2. The original TR cars had proved so popular and effective on road and track that Triumph did the sensible thing and simply updated the design. As a result, the new model shared the overall body shape and 1991cc engine with its predecessor.
And that was absolutely fine because it offered the sporting driver a little under 100bhp, which may not seem much these days but the American magazine Car and Driver described the lightweight TR3’s acceleration as “neck-snapping”, which might have been something of an exaggeration but a sub-11 second time for the benchmark sprint was pretty good back then.
In fact, that power output meant the TR3 was actually more powerful than competitors such as the Porsche 356, Sunbeam Alpine, and the MGA and had a top speed of a little north of 100mph.
But the engine was not the only aspect where the compact sportscar excelled because the TR3 was the first production car to be fitted with disc brakes. After testing this innovation at the 1955 Le Mans 24 Hour race - it achieved numerous racing victories between 1955 and 1959, including winning the Liège-Rome-Liège rallies in 1956 and the Sebring 12 Hours in 1957 - Triumph introduced it to TR3 buyers in 1956 putting cutting-edge, race-car technology in a reasonably priced sports car.
How reasonable? Well, the TR3 cost around £1,103 back in the day, which would be approximately £20,000 today, which is considerably cheaper than ‘cheap’ sportscars like the Mazda MX-5.
The model was updated twice during its lifespan, with the TR3A produced from 1957, and TR3B, which was only made in 1962, the last year of production.
The TR3A was the most popular iteration of the car, with almost 58,000 of them produced. Interestingly, the TR3B was, for a while, made alongside its successor, the Giovanni Michelotti-styled TR4, which debuted in 1961. The company worried that customers might not like the drastic changes that came with the new model and might stop buying the TR marque altogether.
This means that while the TR3B didn’t differ much from the earlier model, it was able to offer the option of the TR4-spec 2.2-litre engine.







