
According to Hagerty (“leading Insurance for people who love cars”) :-
“If you’re tall or especially broad you won’t find the driving position very pleasant – the GT6 is a small car and one which isn’t accommodating of the larger frame. But make the effort, because the handling of a GT6 is really rather good. The view down the bonnet is reminiscent of an E-type, while the way the rear can be semi-drifted through bends in the dry makes them a pleasure to point. They’re warm inside, so we’d recommend fitment of a Webasto roof to aid with ventilation, but it doesn’t detract from the tremendous sense of fun.
The beauty of a parts-bin car like the GT6 is that the parts-bin is available to ensure plenty of spares. Much is shared with the Spitfire, and that which isn’t can be sourced from others within the Triumph range. Specialists such as Rimmer Bros and TRGB can supply pretty much everything the GT6 owner would require from a sump plug washer to a chassis. The shell is less important for prospective buyers than that chassis, so check the steel frame, the outriggers and the bulkhead closely for signs of corrosion. The sills are also structural on GT6s and Spitfires, so warrant closer attention than their saloon brethren.
Most desirable are the MK2 GT6s – sharing round tail style with the safer chassis. Prettiest and most valuable remain the MK1s – while MK3 is the most accessible and best for regular use. Typically a MK3 is worth around 25% less than an equivalent MK1, with the MK2 somewhere in between the two. Original cars tend to be more desirable than modified cars, though a set of period alloy or wire wheels rarely damages the value. One modification which adds value for all but the best examples is the fitment of the larger 2.5 litre straight six, which offers greater power and torque – and courtesy of the TR6, there are more options for further tuning should that be the way you wish to go”.

As of September 2025 they value GT6s from £5,500 (fair) to £25,100 (concours).
On the TSSC website, the values of a GT6 (as at March 2025) varies from £3,000 to £27,000 (see below) depending on condition and version. In 2021 they ranged from £3,000 to £25,000 so values at the top end have increased slightly over the past 4 years.


A useful website is The Classic Valuer (https://www.theclassicvaluer.com/)
I have compiled the data for all the marks of GT6 into a table, see below:

The beauty of this website (created by Giles Gunning and Charles Waller) is that it tracks actual prices paid in auctions and online sales. In the words of Giles “Taking my co-founder Charlie’s experience in artificial intelligence and machine learning and mine in building apps and websites for FTSE 100 clients, we’re here to help save people and businesses time and money when it comes to finding and valuing collector cars. And perhaps most importantly, keeping our passion alive for the next generation”
