Jaguar XJS reborn as 600-plus-hp TWR Supercat

British performance marque TWR has been revived by the son of the original company’s founder, and on Tuesday it revealed its first project, the wild Supercat based on the Jaguar XJS. The iconic Jaguar grand tourer, built between 1975 and 1996, was raced by the original TWR in various touring car championships, so it’s a fitting donor vehicle for…