Lamborghini Miura a less restrictive exhaust system. This single example was eventually sold to a private buyer after extensive testing. In April 1971, the car crashed on the yet-unopened ring road around the city of Brescia, and burned to the ground. It was once widely believed that the Jota had the chassis number of #5084 (a number well out of sequence for the date in question), it has been clarified by Miura expert Joe Sackey in his book The Lamborghini Miura Bible that this is not the case, and that #5084 is in fact a factory modified SV to SVJ spec. A
Production car speed record of Bugatti's record of Fastest production car achieved by the Veyron 16.4 Super Sport. The focus of the review was with respect to what may constitute a modification to a car's standard specification. Having evaluated all the necessary information, Guinness World Records is now satisfied that a change to the speed limiter does not alter the fundamental design of the car or its engine." Some cars were not considered to be the fastest production vehicles, for various reasons. Here is a list of some well known cars that have not been able to meet standards needed to be the fastest