Some classic British sports cars are best left exactly as the factory built them. This 1975 Triumph TR6, however, makes a strong case for thoughtful improvement. Offered on Hagerty Marketplace as part of It's Alive Automotive's British Invasion Collection, this Maple brown roadster has been treated to a long list of mechanical and cosmetic upgrades that aim to keep the car's vintage character intact while making it far more rewarding to drive.
Triumph built the TR6 from 1969 through 1976, wrapping its traditional body-on-frame chassis in handsome bodywork shaped by Karmann and powering it with a 2.5-liter inline-six. It was one of the last of the rugged, no-nonsense British roadsters, and decades later the formula still resonates with enthusiasts who want an open-top driving experience without modern complication.
What sets this particular example apart is the roughly $21,000 in work performed in 2024. The headline changes are a Laycock overdrive conversion paired with a Good Parts triple-carburetor system that replaces the factory twin-carb arrangement. The result, according to the seller, is a car that pulls and sounds noticeably different from a stock TR6. To make room for the new induction setup, the engine was lowered for proper hood clearance, and the speedometer was recalibrated to match.
Earlier owners had already laid the groundwork for a more spirited driver, adding a stainless exhaust, Pertronix electronic ignition, a spin-on oil filter conversion, period-correct Lucas fog lamps, and Talbot-style racing mirrors. Inside, the cabin has been dressed up with Honey Tan leather seat covers, matching carpet, a dark burl walnut dashboard with coordinating door tops, a cross-drilled wood-rim steering wheel, and a RetroSound head unit with satellite radio capability hidden behind the vintage looks.
Finished in factory-correct Maple brown with red pinstriping and topped by a brown convertible roof with a zip-out rear window, the car wears its color combination well. The data plate confirms the original Maple paint and Beige trim, with an April 1975 build date, while the CF37560U chassis number identifies it as a U.S.-spec, left-hand-drive TR6. Chrome wire-look steel wheels with redline tires, a chrome luggage rack, and a fresh Overdrive trunk badge round out the presentation.
The TR6 shows an indicated 62,200 miles, though the seller notes the reading is TMU, and it comes with service and parts records dating back to 2002 that document time in Tennessee, New Jersey, and now Missouri. It is offered with a clean Illinois title, two keys, grille badges, floor mats, and the original steering wheel and boot cover. Honest paint flaws, chips, scratches, and a scuff on the driver's door trim are noted and shown in the listing photos.
For a buyer who wants the timeless looks of a TR6 with the relaxed cruising of overdrive and the extra urgency of triple carbs, this is a compelling package backed by a recent, well-documented round of investment. The auction is live now on Hagerty Marketplace. See it here.
