This tubbed 420G has a twin turbo big block Chevy putting out 900bhp.
I love the racing XJ12 in your last post, Bill, just a shame Jaguar would never cooperate with Ralph Broad to make the racing XJC concept work properly. They used to blow the opposition into the weeds then retire with the brakes on fire or some other mechanical issue.
The street car is the one that Steed drove in the Avengers TV series, it replaced his red 3 litre vdp Bentley. It was completely standard apart from the arches and the wheels.