Jaguar XJ13

The Jaguar XJ13 is the rarest, most priceless Jaguar of all time. Often dubbed as "the greatest Jaguar that never was," the XJ13 was designed for the road but but ended up as a development initiative in the 1960's with the intent on building a V12 for racing that could be tuned for production.

The Jaguar XJ13 was capable of 161mph on the track, but never ended up competing.

Gallery: Jaguar XJ13