A number of people present on the Top Gear track when the Pagani Huayra set the lap record claim said that the car used racing tires, which violates Top Gear's power lap track rules. Season 19 of Top Gear began with the Pagani Huayra setting a new track record with a time of 1:13.8, breaking the one set by the Ariel Atom V8, which is 1:15.1.
According to those present when Stig set the lap record, Pagani cheated by fitting the Huayra with racing tires that bear hand-cut grooves, making them look road-legal. Pagani responded by saying that Huayra was fitted with P Zero Trofeo tires, which are designed specifically for track use but are road legal, concluding that they did not cheat on Top Gear.
Members at TeamSpeed.com forum site analyzed photos taken during the event, then pointed out that sizing and tread pattern of the tires fitted on the Huayra for Top Gear were different from those that Pagani stated.
TeamSpeed members argue that the tires used have the same tread attributes found on Pirelli racing tires fitted on the Pagani Zonda R race car. The situation became worse after Pagani said in a press release after the show that Huayra used P Zero Corsa tires. This makes it appear that the company either meant to mislead or that it committed several mistakes