FIA and F1 manufacturers reach compromise on engine controversy

LONDON, Feb 28 : Formula One's governing body and manufacturers have reached a compromise solution to tackle an engine controversy that had threatened to overshadow next week's start of the season in Australia.

The sport is entering a new era with the biggest changes in decades to the engine and chassis regulations.

Engine compression ratios have been a major talking point, with Mercedes suspected of exploiting a loophole to gain performance through the thermal expansion of components and talk of possible protests after the Melbourne race.

Mercedes have said any change will make no difference to them.   

The governing FIA said in a statement on Saturday that amendments to the 2026 Formula One regulations had been approved unanimously by an e-vote of its World Motor Sport Council.

"A significant effort has been invested in finding a solution to the topic of the compression ratio," it said.

"The FIA has worked to find a compromise solution which determines that the compression ratio will be controlled in both hot and cold conditions from 1 June 2026 and subsequently only in the operating conditions...from 2027 onwards."

The governing body had initially proposedvoting on compliance "not only at ambient conditions but also at a representative operating temperature of 130 degrees Celsius" from August 1. 

An August date would have covered more than half the 24-race season before any change was implemented.

Mercedes supply their V6 engines to four of the 11 teams - champions McLaren as well as their own works team, Williams and Renault-owned Alpine.

The remaining manufacturers are Red Bull, who are now making their own engines and supply sister team Racing Bulls, Audi, Honda (Aston Martin) and Ferrari - who also supply Haas and newcomers