1971 Triumph GT6 Mk III

2dr Coupe

6-cyl. 1998cc/79hp 2x1bbl

#1 Concours condition#1 Concours
#2 Excellent condition#2 Excellent
#3 Good condition#3 Good

$12,800*

-12.3%
#4 Fair condition#4 Fair
Value Graph04/2407/2410/24$5k$10k$15kJan 2025
Let us watch the market for you

We update the Hagerty Price Guide each quarter. Sign up for alerts and we'll notify you about value changes for the cars you love.

1966-1973 Triumph GT6 stats
Highest sale
$173,121
Lowest sale
$3,000
Most recent sale
$10,469
Sales
141

Photos

8 photosImages may not reflect selected vehicle.

1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
1973 Triumph GT6
insurance

Protect your 1971 Triumph GT6 from the unexpected.

Better coverage built for classics at a price you can afford. Online quotes are fast and easy

Model overview

Model description

The talented Italian stylist Giovanni Michelotti was essentially Triumph’s house designer in the early 1960s. The Spitfire 4 of 1963 was a particularly nice effort on his part, far prettier than the big TR sports cars that he also penned. When the Standard Triumph works competition team fitted an aerodynamic hard top to the car for a highly successful campaign at the famed 24 Hours of Le Mans, the marketing people began to think about adding a neat little coupe to the Spitfire line.

The resulting coupe was indeed neat (looking a great deal like a 2/3-scale E-type) but the tiny Spitfire four-cylinder rendered the car woefully underpowered. Triumph substituted the smooth little 2.0-liter six from the Vitesse and thus had a fairly refined little GT to compete with the newly introduced 1966 MGB GT. That is refined until the limit of its grip was reached in a corner—the car’s fairly crude Triumph Herald-derived swing axle rear suspension resulted in appalling changes in camber and cars leaving the road hatchback first.

After an outcry from U.S. dealers (smarting from Ralph Nader’s bashing of the swing axle Corvair) Triumph rectified the situation with the 1968 GT6 Mk II (earlier cars became retroactively known as Mk Is, while the Mk II was referred to as the GT6+ stateside) which added a set of side vents, and a less attractive raised bumper in front to comply with U.S. laws. Emission controls became a part of the program in the U.S. for the first time and while the rest-of-the-world GT6 got a bit quicker, the U.S. models got slower.

The final changes came for the 1971 model year with the Mk III which got a simpler revised (but still effective) rear suspension and a general clean-up again by Michelotti to mirror the Kamm tail of the new Spitfire. It’s a bit of a toss-up as to which is prettier, the Mk I or Ml III. Both are quite nice.

By the early 1970s, the writing was on the wall for the GT6. The Datsun 240Z had burst onto the scene and it was an altogether better car in almost every measure. And while the Spitfire on which it was based soldiered on for another seven years, the GT6 was quietly dropped after 1973.

Today, GT6s are quite collectible because of the smooth little six and faux E-type styling. Parts support is quite good and the earliest cars while in the shortest supply are the most desirable.

Find more values
Search for prices of other cars, trucks, vans and motorcycles
Classic car

Common Questions

The value of a 1971 Triumph GT6 Mk III can vary greatly depending on its condition, mileage, options, and history. Typically, you can expect to pay around $12,800 for a 1971 Triumph GT6 Mk III in good condition with average spec.

The highest selling price of a 1971 Triumph GT6 Mk III at auction over the last three years was $23,100. 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 1971 Triumph GT6 Mk III at auction over the last three years was $10,469. 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 8 1971 Triumph GT6 Mk IIIs sold at public auction.

The most recent auction sale of a 1971 Triumph GT6 Mk III was $10,469 on January 30, 2025 by Bring a Trailer.

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.

All prices shown here are based on various data sources, as detailed in About Our Prices. The Hagerty Price Guide is for informational purposes only and is not intended as financial advice. More information on how forecast models are calculated can be found on Forecasted Values page. For additional information and a complete description of benefits, visit hagerty.com/legal. Purchase of insurance not required for membership in HDC. Hagerty, Hagerty Valuation Tools & Hagerty Drivers Club are registered trademarks of The Hagerty Group LLC, ©2025 The Hagerty Group, LLC. All Rights Reserved. The Hagerty Group, LLC is a wholly owned subsidiary of Hagerty, Inc.