Rivals Compare 'Tainted' Supercars Champ To Lance Armstrong

Supercars champion Scott McLaughlin's racing rivals say his 2019 title will be "forever tainted" and compared the Kiwi's use of an illegal engine to disgraced cyclist Lance Armstrong.

Ford star McLaughlin was fiercely sledged on social media by Holden duo Scott Pye and Nick Percat on the eve of the season-ending Newcastle 500.

Pye landed the first blow on Instagram when he posted an article quoting McLaughlin saying he was "annoyed" with his peers following the fallout of his Bathurst sanction for using an illegal engine.

"Tired of seeing this rubbish. As one of his 'peers' I've never spoken to Scotty about this or been critical of the team," Pye said.

"But you must understand that some people are going to be pissed off that a car and team that's been constantly found to be illegal continues to get meaningless penalties.

"Not saying you wouldn't have won, clearly doing a great job but who knows. It will forever be tainted."

McLaughlin has been compared to Lance Armstrong by fellow drivers. Image: AAP

DJR Team Penske ace McLaughlin took exception to the "constant" accusation and said he'd won 18 races this season with a legal car.

"We were found once of a technical infringement in one qualifying out of 325 times being scrutineered," McLaughlin said.

"So now you understand why I believe this is how our title hasn't been tainted."

Percat then compared McLaughlin to Armstrong, who was stripped of seven Tour de France titles after admitting to years of doping.

"Even if it was once that's enough to bring everything into question. Lance Armstrong (most tested athlete) was caught once, but it ruined his whole career," he said.

The comparison to Lance Armstrong in no way suggested that McLaughlin has ever taken any performance enhancing drugs.

The trio will resume their on-track rivalry when practice sessions begin in Newcastle on Friday.