After the Koenigsegg Agera RS was found not eligible for this list since only 11 cars had engines rated higher than 865 kW, the former 25 car minimum was dropped and replaced with new rules based on suggestions by Koenigsegg PR manager Steven Wade.
Examples of the difficulties faced were highlighted in a two-week long dispute regarding Bugatti's record set in 2010, and Hennessey's 2013 claim that their own top speed run – slower than Bugatti's, lacking the required two-way average, and lacking the minimum 25 car production run – was the real record, due to an issue regarding electronic limiters.
Guinness Book of Records, which had listed speeds by British cars with modified rev.
In April 2013, following a press release claiming the record for the Hennessey Venom GT due to the electronic limiter issue, The Sunday Times quoted Guinness' public relations director Jaime Strang as saying: "As the car's speed limiter was deactivated, this modification was against the official guidelines.
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.