Buyer’s Guide — Triumph GT6
What to know before buying a Triumph GT6.
Overview
The Triumph GT6 was produced from 1966 to 1973, with approximately 40,900 built across three marks. Essentially a Spitfire with a hardtop and the 2.0 litre straight-six from the Triumph 2000 saloon, the GT6 offered genuine 100 mph performance in an attractive fastback coupe body styled by Giovanni Michelotti.
What to Look For
| Chassis | Backbone chassis — check for corrosion, particularly at the rear where the differential mounts and at the outriggers. |
| Sills | Check inner and outer sills for corrosion — they are structural. |
| Body | Check around headlight bowls, front valance, rear wheel arches, and door bottoms for rust. |
| Engine | The 2.0 litre inline-six is smooth and reliable. Check oil pressure and listen for timing chain noise. Overheating can warp the head. |
| Rear Suspension | The Mk I has a swing-axle rear that gives poor handling — the Mk II and Mk 3 have a redesigned rear end with Rotoflex couplings. Check Rotoflex couplings for cracking — they deteriorate and need replacement. |
| Gearbox | Four-speed with optional overdrive. Overdrive is highly desirable. Check synchros on 2nd gear. |
Parts Availability
Good — Rimmer Bros, Moss Motors, and Triumph specialists carry most parts. Many components are shared with the Spitfire and Triumph 2000.
What a Good One Should Feel Like
Smooth and refined compared to the Spitfire. The six-cylinder engine should pull cleanly and rev willingly with a pleasing exhaust note. The GT6 should feel like a proper GT car — capable of long distances at speed. The Mk 3 with its improved rear suspension handles the best.
Price Guide (Approximate, 2026)
| Project / Needs Work | $8,000 – $15,000 |
| Good Driver | $18,000 – $30,000 |
| Excellent / Restored | $32,000 – $48,000 |
Mk 3 models are generally the most desirable due to the improved rear suspension. Overdrive adds 10–15% to value.