The decision by Red Bull Racing to change Max Verstappen’s power unit ahead of the Brazilian Grand Prix has not gone unnoticed by McLaren. Team principal Andrea Stella has openly questioned whether the move fully complies with Formula 1’s strict budget cap regulations, calling for more clarity on the matter after the race in São Paulo.
Following a disastrous qualifying session on Saturday, the Red Bull team decided to take a bold gamble with Max Verstappen, fitting a new engine and starting the race from the pit lane. The strategy proved highly effective, as the Dutch driver charged through the field to claim a third-place finish. However, the choice sparked immediate suspicions within the McLaren camp, which requested an explanation from the FIA regarding the financial implications of such an engine change.
The Milton Keynes-based team not only replaced Verstappen’s power unit but also took advantage of the opportunity to introduce several technical updates to the RB21, including fitting the floor specification previously used at the Mexican Grand Prix instead of the one from Austin. The decision was seen as a calculated risk that could yield performance benefits in the final phase of the season.
Despite suffering an early puncture, Verstappen’s recovery drive to the podium demonstrated the effectiveness of Red Bull’s setup changes. Yet, McLaren’s leadership expressed serious doubts about whether the move fell within the financial limits set by Formula 1’s cost cap regulations.
Andrea Stella questions Red Bull’s compliance with the budget cap
After the race, McLaren team principal Andrea Stella did not hide his concerns. “To be honest, this kind of power unit change raises questions about the regulations,” he told reporters. “I’d really like to understand whether the cost of this engine is included within the budget cap or not.”
He continued by highlighting a potential gray area that could be exploited by teams: “If the change was made for performance reasons, then it should definitely count towards the spending limit. We’ll see if that’s the case, although obviously we have no way to verify it ourselves, since it’s an internal Red Bull matter. But that’s exactly why we wouldn’t do something like this — because for us, it would fall under the cost cap.”
Stella’s comments suggest that McLaren believes there may be a regulatory loophole allowing certain teams to gain a technical advantage without incurring additional costs within the financial limits, effectively bypassing the spirit of the budget cap. His statement adds pressure on the FIA to clarify how such engine-related expenditures are monitored and categorized.
Red Bull defends its decision
On the other side, Red Bull has firmly defended its actions, insisting that the decision was entirely legitimate and strategically motivated. Team director Laurent Mekies explained that the move was part of a broader plan to maximize the team’s performance during the closing stages of the championship.
“It’s always a good idea to fit a new engine,” Mekies said. “We were on schedule to finish the year without needing replacements, but we took the opportunity because we also wanted to make some setup adjustments to the car. The differences may be small, but at this level, every single detail matters.”
The former Ferrari sporting director emphasized that the decision had nothing to do with bypassing financial limits, but rather with optimizing reliability and exploring new configurations for future races. “Our approach was fully strategic,” Mekies explained. “We used the rules as they are written, and there’s no hidden motive behind it.”
Nevertheless, McLaren’s doubts highlight the growing tension among Formula 1 teams regarding the interpretation of the cost cap framework. With budgets now tightly controlled, even seemingly minor upgrades or component replacements can spark debate over financial fairness and technical intent. The balance between innovation and regulation continues to be one of the sport’s most complex challenges.
As the season nears its conclusion, the controversy surrounding Red Bull’s engine switch in Brazil could reignite broader discussions about transparency and cost monitoring within Formula 1. For McLaren, Stella’s public remarks serve as both a warning and a call for consistency — ensuring that all teams play by the same financial rules in the battle for performance and competitiveness.
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