Jaguar Masterpiece, the Xk engine.

"The XK engine was destined to power some of the most evocative cars of the century. It was an engine which would speed Jaguar cars to five historic victories in the Le Mans twenty four hour race. It was an engine which would power generations of luxury saloons. It remained in production for over forty years. This engine helped transform the company from an ambitious but specialist car builder into one of the world’s premier luxury manufacturers…”

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(Source: crankandpiston.com)