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1967 Triumph TR4A news, pictures, and information
The Triumph TR4 was introduced in 1961. The body had been given a modern and updated appearance by Michelotti but its drive-train and chassis were based on its TR predecessors. Production lasted until 1965 when it was replaced by the TR4A.
Prior to its release and while under development, the car was referred to by its codename, 'Zest'. The TR Series was a popular sports car but it did have its drawbacks and inconveniences. 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. A redesigned angular rear allowed for a trunk. The trunk and roll-up windows meant that items could be stored safely in the car. The prior plastic side curtains were easily torn and property was often stolen. The soft top could still be compromised but with the addition of the optional removable hard top, the TR4 became very versatile. The hard top had a fixed glass rear window and an integral roll-bar. The first five hundred produced had an aluminum center panel while the rest had a steel center unit.
The TR4 improved performance for the little sports car. The track was enlarged and the steering now used a rack-and-pinion unit. The transmission was now fully synchronized on all gears and the engine was enlarged slightly. An optional Laycock de Normanville electrically operated overdrive could be selected for second, third, and fourth gear.
The wheels original used were 15x4.5 inch disks. One of the more typical tires was the 165x15 bias ply. 48 lace wire wheels could be ordered and were often painted the same color as the car. Other popular options were to have them painted silver, matte, or polished chrome.
The TR4 was successful both in sales and in sporting events. They could often be seen competing in SCCA, hill-climb, and rally events where they provided plenty of podium finishes for their owners. The wet-sleeve engine was very convenient. The cylinder liners and pistons were easily changed allowing the vehicle to compete under different capacity rules. Some TR4 racers were given a supercharger which raised the 105 bhp SAE output to over 200.
In 1965 the TR4 was given an independent rear suspension, slightly modified frame, and various styling changes. In response to these changes the TR4 was dubbed the TR4A. Production of the TR4A continued until 1968 when it was replaced by the six-cylinder TR250.
The new suspension was an effort by the company to enhance the comfort of the vehicle and address customer complaints. Though the main difference between the TR4 and TR4A was the independent suspension, only about 75 percent of the TR4A models actually had this new suspension. These vehicles can be identified by the 'IRS' badge on the rear of the vehicle. The estimated 25% that did not receive the 'IRS' equipment had the solid rear axle configuration. The reasons for keeping with the solid rear axle was to provide a production racer for those who favored performance over comfort. The solid rear axle was easier to prepare for racing than was the 'IRS' setup. However, the independent rear suspension did not mean that the TR4A was not a competitive racer. The setup proved its potential at the Sebring 12 Hour race in 1966 when three TR4A models with 'IRS' finished in the top three spots.
The TR4 and TR4A were proven vehicles, with an attractive sticker price, sporty intentions, favorable appearance, and many conveniences of the day.
© 1998-2009. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.
Prior to its release and while under development, the car was referred to by its codename, 'Zest'. The TR Series was a popular sports car but it did have its drawbacks and inconveniences. 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. A redesigned angular rear allowed for a trunk. The trunk and roll-up windows meant that items could be stored safely in the car. The prior plastic side curtains were easily torn and property was often stolen. The soft top could still be compromised but with the addition of the optional removable hard top, the TR4 became very versatile. The hard top had a fixed glass rear window and an integral roll-bar. The first five hundred produced had an aluminum center panel while the rest had a steel center unit.
The TR4 improved performance for the little sports car. The track was enlarged and the steering now used a rack-and-pinion unit. The transmission was now fully synchronized on all gears and the engine was enlarged slightly. An optional Laycock de Normanville electrically operated overdrive could be selected for second, third, and fourth gear.
The wheels original used were 15x4.5 inch disks. One of the more typical tires was the 165x15 bias ply. 48 lace wire wheels could be ordered and were often painted the same color as the car. Other popular options were to have them painted silver, matte, or polished chrome.
The TR4 was successful both in sales and in sporting events. They could often be seen competing in SCCA, hill-climb, and rally events where they provided plenty of podium finishes for their owners. The wet-sleeve engine was very convenient. The cylinder liners and pistons were easily changed allowing the vehicle to compete under different capacity rules. Some TR4 racers were given a supercharger which raised the 105 bhp SAE output to over 200.
In 1965 the TR4 was given an independent rear suspension, slightly modified frame, and various styling changes. In response to these changes the TR4 was dubbed the TR4A. Production of the TR4A continued until 1968 when it was replaced by the six-cylinder TR250.
The new suspension was an effort by the company to enhance the comfort of the vehicle and address customer complaints. Though the main difference between the TR4 and TR4A was the independent suspension, only about 75 percent of the TR4A models actually had this new suspension. These vehicles can be identified by the 'IRS' badge on the rear of the vehicle. The estimated 25% that did not receive the 'IRS' equipment had the solid rear axle configuration. The reasons for keeping with the solid rear axle was to provide a production racer for those who favored performance over comfort. The solid rear axle was easier to prepare for racing than was the 'IRS' setup. However, the independent rear suspension did not mean that the TR4A was not a competitive racer. The setup proved its potential at the Sebring 12 Hour race in 1966 when three TR4A models with 'IRS' finished in the top three spots.
The TR4 and TR4A were proven vehicles, with an attractive sticker price, sporty intentions, favorable appearance, and many conveniences of the day.
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Automobile information, history, and specifications from concept to production. | © 1998-2009 Conceptcarz.com
subscribe - RSSAutomobile information, history, and specifications from concept to production. | © 1998-2009 Conceptcarz.com