1972 Triumph GT6 mK3, Finished in BRG with black vinyl interior. The final major facelift for the GT6 came in 1970 in the form of the Mk III. This time the entire bodyshell was revised to match the changes made to the Spitfire Mk IV: modifications included a cut-off rear end, recessed door handles and a smoother front end. Only detail changes were made to the mechanics, but in 1973 – close to the end of the car's production life – the rear suspension was changed again, this time for the cheaper (but still effective) "swing-spring" layout fitted to the Spitfire Mk IV. This was a modification of the swing axle rear suspension used on the Herald-derived models, with the transverse leaf spring mounted on a pivot, eliminating roll stiffness at the rear, and thus greatly reducing the jacking effect under cornering loads. To compensate for this loss of roll stiffness, a larger front anti-roll bar was fitted. A brake servo was also added in 1973, and seats were changed from vinyl to cloth. There was still a fairly comprehensive options list, but the knock-on wire wheels were no longer available. The unladen weight increased slightly to 2,030 lb (920 kg).
Engine power and torque for the Mk III was similar to the Mk II, but better aerodynamics led to a new top speed of 112 mph (180 km/h) and a 0–60 mph time of 10.1 seconds. Performance was now comfortably ahead of the MGB GT, which reached about 105 mph (169 km/h) and 60 mph in approximately 13 seconds.
Last owner was a Triumph engineer, meaning this car runs and drives beautifully and is ready for tours and rallies.