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1966 Triumph TR4A
2dr Roadster
4-cyl. 2138cc/104hp 2x1bbl
#1 Concours condition#1 Concours
#2 Excellent condition#2 Excellent
#3 Good condition#3 Good
$18,200*
-12.1%
#4 Fair condition#4 Fair
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Apr 2025
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1961-1967 Triumph TR4 stats
Highest sale
$97,200
Lowest sale
$1,210
Most recent sale
$18,487
Sales
437
Photos
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Past sales
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Model overview
Model description
Building off of the TR3's success, Triumph unveiled the TR4 in 1961. Furthering the evolution of the earlier model, the TR4 combined a low cost of entry with a capable open-top sports car to become one of Triumph's best-loved cars.
Stylistically, the TR4 was quite a departure from the TR3. Gone were the low-cut doors and polarizing grille of its predecessor, and in their place was a more modern design courtesy of Giovanni Michelotti. A spacious trunk, high beltline, full-sized doors with roll-up windows, and a revised front look brought the company into a new era.
Mechanically, the car possessed the same 105-hp, 2138 cc, inline four-cylinder engine that was offered during the TR3's later iterations, though buyers who were looking race their Triumph in two-liter classes could opt for the 1991 cc mill. The TR4's chassis was initially the same as its predecessor, though the track was wider and steering was through a rack and pinion set-up.
In 1965, Triumph released the TR4A (which was never referred to as such by the company itself). The car marked the introduction of a completely new independent rear suspension, and the TR4's ride benefitted greatly.
Popular options on the TR4 included overdrive and a "Surrey" top that resembles what is today called a Targa roof. TR4A buyers could also opt to replace their independent rear suspension with the TR4's solid rear axle.
In all, just over 40,000 TR4s left the Coventry factory. And like most British roadsters of the era, the lion's share landed in the U.S. Their relative affordability, good handling, and brisk performance made them a popular choice on the track, and they continue to be an entertaining drive today.
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Common Questions
The value of a 1966 Triumph TR4A can vary greatly depending on its condition, mileage, options, and history. Typically, you can expect to pay around $18,200 for a 1966 Triumph TR4A in good condition with average spec.
The highest selling price of a 1966 Triumph TR4A at auction over the last three years was $52,496. The highest prices are usually reserved for rare or exceptionally well-maintained examples with desirable features or modifications and excellent history.
The lowest selling price of a 1966 Triumph TR4A at auction over the last three years was $2,250. The lowest prices are usually paid for examples that have extensive maintenance needs, differ greatly from their original configuration, or have accident histories or title problems.
In the last three years there have been 28 1966 Triumph TR4As sold at public auction.
The most recent auction sale of a 1966 Triumph TR4A was $18,487 on March 20, 2025 by Car and Classic.
Many factors can increase a car's value including excellent condition, exceptional originality, a recent restoration, low mileage, unique provenance, desirable options, popular or unique color choices, and excellent maintenance records. Upgrades and modifications that enhance performance or aesthetics can also add value.
Factors that can decrease a car's value include unusually high mileage, poor maintenance history, visible wear and tear, accidents or damage, title issues, and gaps in ownership history. Additionally, less popular color choices and extensive modifications that don't appeal to a broad audience can reduce value.
Mileage plays a significant role in a classic car’s value. Lower mileage usually increases value because it indicates a higher degree of originality, is rarer, and suggests less wear and tear. However, cars with exceptionally low mileage may also have maintenance needs due to lack of use. Whether someone should pay more for a vehicle with lower miles will depend on how they plan on using it, and the vehicle's specific condition.
The value of modified cars differs widely based on the type and quality of modifications. While some modifications can significantly increase value, especially performance enhancements and high-quality custom work, others may not add much or could even detract from the car’s value if they appeal to only a limited audience.