The beautiful car was designed to compete with the Ferraris and Fords in the heyday of GT-class racing at Le Mans, but development of the design was held back while the company focused on the XJ6 production car, and when the car was finally finished in 1966, racecar design had moved on and it was already obsolete. The rear-engined car was powered by a 5-liter V12 putting out 502 hp, the car easily surpassed the 160 mph mark in early testing.
Although Jaguar only built one XJ13, the Malcolm Sayer design spawned a number of replicars. If you can't get to the November MPH show in Earl's Court, check out this video of the car on display at the Pebble Beach Concours.
Forty years old and still one of the most beautiful cars we've ever seen!