Triumph TR 4 – Classic Car Marketplace

Introduction and History of the Triumph TR4

The Triumph TR4, produced from 1961 to 1965 by the Triumph Motor Company, was developed as the successor to the TR3A. Designed by renowned Italian stylist Giovanni Michelotti, the TR4 marked a shift from the rounded forms of earlier Triumphs to a bold, angular appearance. The roadster was built for both European and American markets, gaining recognition for its advanced features at the time, such as adjustable ventilation and wind-up side windows. Production commenced in Coventry, with the majority of vehicles exported to the US. Motorsport played a significant role in the TR4’s reputation, with competitive outings at classic events like Le Mans and Sebring. After the TR4, the range evolved into the TR4A, and then the TR5.

Model History

Following in the footsteps of the TR2 and TR3, the Triumph TR4 was introduced as a modern update while retaining the core mechanical layout of its predecessors. The TR4A emerged in 1965, distinguished by the adoption of an independent rear suspension (IRS), enhancing ride and handling characteristics. Changes included subtle styling revisions to meet US regulations, most notably the repositioned indicators and a newly engineered chassis. A rare variant, the Dové GTR4 Coupé, was produced by Thomas Harrington Coach Builders, converting about 50 TR4/TR4A examples into fastback coupés. In total, approximately 68,700 TR4 and TR4A units were manufactured before the TR5 succeeded the model in 1967.

Highlights of the Triumph TR4

Uniqueness characterises the Triumph TR4. It was the first TR with wind-up windows and face-level ventilation. The optional 'Surrey Top' (a modular hardtop system) predated similar ideas later applied by other brands. The TR4 offered a large boot, practical for a roadster of its era, while its robust 2.1-litre engine provided reliable performance for both daily drives and motorsport. Interior finishes often featured leather or vinyl sports seats, a wood dash, and period Smiths instrumentation. Overdrive transmission and wire wheels were popular options among enthusiasts.

Technical Data

Special Editions and Collectible Models

Several rare variants stand out. Notably, a small number were converted into Dové GTR4 Coupés by Thomas Harrington, featuring a fastback body and improved practicality. The Le Mans racing editions, specifically prepared for endurance events, and the very early 'Surrey Top' models with aluminium roof panels are also sought after today. Factory options such as overdrive, wire wheels, and Moto-Lita steering wheels further distinguish certain examples.

Weak Spots and Common Issues

Common issues typical for the Triumph TR4 include corrosion in the chassis and body panels (particularly sills and floorboards), worn suspension bushings, and oil leaks from the engine or gearbox. Electrical systems at this age can develop faults, especially in cars not regularly used. Overdrives and carburettors may require periodic adjustment. Restoration is well supported due to strong club and parts support, but buyers should check documentation and originality, as many cars have been modified over the decades.

Engine and Performance, Transmission and Handling

Early TR4s featured a robust inline-four engine, rated at 100–104 hp, delivering lively acceleration for its time. The introduction of overdrive allowed longer gearing, reducing engine stress during motorway cruising. TR4A models switched to independent rear suspension, markedly improving handling and comfort, reducing the tendency to 'hop'over bumps compared with earlier leaf-sprung cars. Motorsport history is a highlight, with IRS-equipped TR4As placing strongly at endurance events such as the 12 Hours of Sebring in 1966. In practice, the TR4's driving experience is defined by communicative steering, a mechanical gearshift feel, and a sporting exhaust note. - Triumph TR4: 2,138 cc, 100 hp, front double wishbone suspension, rear live axle (1961–65)

• Triumph TR4A IRS: 2,138 cc, 104 hp, independent rear suspension, improved handling (1965–67)
• Dové GTR4 Coupé: Fastback conversion, limited production for increased practicality

Interior, Comfort, Exterior and Design

Michelotti's crisp lines, prominent front grille and integrated wings give the TR4 a recognisable profile among 1960s sports cars. Interiors commonly feature two-tone seats in leather or vinyl, matching carpets and a walnut veneer dash packed with Smiths instruments. Adjustable ventilation and wind-up windows were novelties for Triumph at the time. Exteriors were available in a wide colour palette – red, white, blue and green being common – and buyers often fitted wire wheels, chrome luggage racks, or Lucas fog lamps. The innovative 'Surrey Top' system combined the advantages of an open car with coupé practicality, anticipating later targa roof models.

Other Relevant Features

Comprehensive documentation, including Heritage Certificates, is available for many examples. TR Registers and specialist clubs support restoration and maintenance with expertise and parts supply. Spares availability remains strong, making the TR4 a practical classic for regular use or concours restoration.

Summary

The Triumph TR4 carved out its place among British sports cars with sharp Michelotti styling, progressive driving technology, and solid mechanicals. Supported by a strong network of specialists and parts supply, it is valued by drivers seeking a genuine 1960s roadster experience combined with British engineering and Italian flair.