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, the Rotoflex fix, and what to look for when buying one.