The original XJ13 was a V12-powered one-off prototype developed in the 1960s under the direction of Jaguar Chief Engineer William Heynes with aluminum bodywork styled by C-, D-, and E-Type designer Malcolm Sayer. The car achieved a MIRA high-speed circuit record of 161.655 mph during 1967 testing but was unable to realize its intended future as a Le Mans contender due to rule changes. After being severely damaged during a promotional shoot in 1971, the XJ13 was rebuilt…