Triumph GT6: the poor man's E-Type (1966-1973) The Triumph GT6 was a handsome six-cylinder fastback coupe on the Spitfire platform, nicknamed the baby E-Type, whose tricky swing-axle handling was famously cured by the Rotoflex rear suspension of the Mk2. A guide to the three marks, the handling saga, what to look for when buying, and why it remains one of the most undervalued classic British GTs.