The TR3 is a traditional English roadster and an evolution of Triumph's earlier TR2 model, with increased engine power and improved braking.
The "TR3A" was a minor update from the TR3. The updates included the new wide front grill, exterior door handles and lockable boot handle.
A sales and Motorsport success, approximately 74,800 TR3s were sold across all variants. The TR3 was campaigned in races, hill climbs, and rallies across Europe and North America, with several outright, team, and class victories to its credit.