Vitesse 2-Litre
In 1966 Triumph upgraded the engine to 1998 cc, in line with the new Triumph GT6 coupé, and relaunched the car as the Vitesse 2-Litre. Power was increased to 95 bhp (71 kW), endowing the new car with a 0–60 mph time of just over 11 s. (The 2-Litre was advertised by Triumph as "The Two Seater Beater"), The performance increase was welcome, but it highlighted the deficiencies of the rear suspension, also noted on the new GT6 and the Spitfire. There were detail modifications for the 2-litre, including a stronger all synchromesh gearbox and uprated brakes, and an improved stronger differential than the Vitesse 6 (still 3.89:1) ratio. The overdrive GT6 used the same differential, though the cars without overdrive specified used a 3.27:1 differential of the same dimensions, though that was not fitted to the Vitesse as standard. There was a satin silver anodised aluminium-alloy cowling above the reversing light, and badges on the side of the bonnet read 2 litre.
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