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The Giovanni Michelotti designed Triumph TR4 proceeded the TR2 and TR3. It was the last of the four cylinder TRs until the TR7 was introduced in 1975. The chassis and running gear from the TR3 was used to help reduce cost.
During 1961, the TR4 was released. It was more comfortable, practical, and had more room than the previous TR's. Rack-and-pinion steering and servo brakes became available and an optional 2138 cc engine was also offered.
The 1965 TR4A version received a new chassis featuring independent suspension which improved handling. This was the first major update since the 1961 TR4 release.
In 1967 a six-cylinder engine with fuel-injection became available. The US was able to get the six-cylinder but unable to get a fuel-injection version.
During 1961, the TR4 was released. It was more comfortable, practical, and had more room than the previous TR's. Rack-and-pinion steering and servo brakes became available and an optional 2138 cc engine was also offered.
The 1965 TR4A version received a new chassis featuring independent suspension which improved handling. This was the first major update since the 1961 TR4 release.
In 1967 a six-cylinder engine with fuel-injection became available. The US was able to get the six-cylinder but unable to get a fuel-injection version.
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.
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.
1963 Triumph TR4 |
|
| Year | 1963 |
| Make | Triumph |
| Model | TR4 |
| Body Style | Roadster |
| Engine Location | Front |
| Drive Type | Rear Wheel |
| Body / Chassis | Steel body on steel frame |
| Production Years for Series | 1961 - 1965 |
| Body Designer | Giovanni Michelotti |
| Weight | 2130 lbs | 966.2 kg |
| Performance | |
| 0-60 mph | 11.5 seconds. |
| Engine | |
| Engine Configuration | I |
| Cylinders | 4 |
| Solid valve lifters | |
| Aspiration/Induction | Normal |
| Displacement | 2138.00 cc | 130.5 cu in. | 2.1 L. |
| Valvetrain | OHV |
| Horsepower | 104.00 BHP (76.5 KW) @ 4700.00 RPM |
| Torque | 132.00 Ft-Lbs (179 NM) @ 3350.00 RPM |
| HP to Weight Ratio | 20.5 LB / HP (Vehicles with similar ratio) |
| HP / Liter | 49.5 BHP / Liter |
| Compression Ratio | 9.0:1 |
| Main Bearings | 3 |
| Fuel Type | Gasoline - Petrol |
| Block | Cast-iron |
| Ignition System | 2 SU carbs |
| Vehicles with similar horsepower and weight | |
| Standard Transmission | |
| Gears | 4 |
| Transmission | Manual |
| with Overdrive | |
| Similar Automakers |
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| View Specifications |
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| 1963 Triumph models |
| Spitfire |
| Other Model Years |
| 1967 TR4A |
| 1966 TR4A |
| 1965 TR4A |
| 1964 TR4 |
| 1962 TR4 |
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Automobile information, history, and statistics from concept to production. | © 1998-2008 Conceptcarz.com
Automobile information, history, and statistics from concept to production. | © 1998-2008 Conceptcarz.com