http://supercars.ifn.cx/xjr-15/index.shtml the XJR HP is low cause of one reason. It uses the same 6.0L engine found in the XJ12, and the XJS through 1996. just had been tuned a little bit for some extra 12. the lightweight design of the XJR15 helped its 0-60 time. having a true racing engine, this car would be faster. however, the car is still produced in limited numbers. dubbed, the last Jaguar supercar.... until another one rolls out.