Paul P sends us Challenger II - "Challenger I was cool, but Challenger II was quite the story - didn't make the run, Ford pulls sponsorship, Mickey and his son are going to try with it 20 years later, Mickey and his wife are murdered by an ex-business associate, in 2018 his son brings a restored/upgraded version to set records.” The Challenger II - driven by Danny Thompson and powered by twin nitromethane-fueled Hemi V8 engines pushing out 5,000 horsepower, holds the official world land speed record for a piston-powered wheel-driven vehicle at 448.757 miles per hour.