The new suspension was an effort by the company to enhance the comfort of the vehicle and address customer complaints.
Production of the TR4A continued until 1968 when it was replaced by the six-cylinder TR250. In response to these changes, the TR4 was dubbed the TR4A. In 1965 the TR4 was given an independent rear suspension, slightly modified frame, and various styling changes. Some TR4 racers were given a supercharger which raised the 105 bhp SAE output to over 200. The cylinder liners and pistons were easily changed allowing the vehicle to compete under different capacity rules. The wet-sleeve engine was very convenient. They could often be seen competing in SCCA, hill-climb, and rally events where they provided plenty of podium finishes for their owners. The TR4 was successful both in sales and in sporting events. Other popular options were to have them painted silver, matte, or polished chrome. 48 lace wire wheels could be ordered and were often painted the same color as the car. The original wheels were 15x4.5 inch discs and one of the typical tires was the 165x15 bias ply.
An optional Laycock de Normanville electrically operated overdrive could be selected for second, third, and fourth gear. The transmission was now fully synchronized on all gears and the engine was enlarged slightly. The track was enlarged and the steering now used a rack-and-pinion unit.
The TR4 improved performance for the little sports car. The first five hundred produced had an aluminum center panel while the rest had a steel center unit. The hardtop had a fixed glass rear window and an integral roll-bar. The soft top could still be compromised but with the addition of the optional removable hardtop, the TR4 became very versatile. The prior plastic side curtains were easily torn and property was often stolen.
#TRIUMPH TR3A 1959 WINDOWS#
The trunk and roll-up windows meant that items could be stored safely in the car. A redesigned angular rear allowed for a trunk. The introduction of the TR4 eliminated a few of the inconveniences by offering roll-up windows in place of the noisy and impractical side-curtains.
#TRIUMPH TR3A 1959 SERIES#
The TR Series was a popular sports car but it did have its drawbacks and inconveniences. Prior to its release and while under development, the car was referred to by its codename, 'Zest'. Production lasted until 1965 when it was replaced by the TR4A. The body had been given a modern and updated appearance by Michelotti but its drive-train and chassis were based on its TR predecessors. Modifications such as Weber carburetors and improved transmissions are a favorite for many competitors and SCCA contenders.ĭuring its production run, lasting from 1957 through 1961, around 58,000 examples were created. The TR series has been a familiar scene in racing competition and club events ever since their inception. Throughout its life span, larger brakes and a engine modifications were introduced. With an overall weight of the vehicle tipping the scale at 2200 pounds, meaning horsepower to weight ratio was excellent. The vehicle featured a four-cylinder, 95 horsepower engine. The TR3A was a reliable vehicle this was proven in 1960 during the grueling Le Mans 24 Hour race where three cars were entered and finished, placing ninth, eleventh and fifteenth. The 3A featured improved design and mechanics, resulting in a top speed of 105 mph. 1959 Triumph TR3A History In 1957 the Triumph TR3A was introduced as a replacement for its predecessor, the TR3.
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