Lewis Hamilton reignited the Formula 1 title fight with a stunning victory at the Spanish Grand Prix in Barcelona, reducing championship leader Kimi Antonelli’s advantage to 41 points.
Hamilton delivered an outstanding performance to secure his first win for Ferrari, while Antonelli’s race ended in disappointment after a mechanical failure forced the Mercedes driver to retire in the closing laps.
The result capped a near-perfect weekend for Ferrari. The team’s impressive qualifying pace evidenced by Hamilton’s front-row start translated into strong race speed, while flawless strategy calls and a well-timed Virtual Safety Car helped seal the victory.
FIA Engine Rule Under the Spotlight
However, former F1 team manager and respected analyst Peter Windsor believes Ferrari’s resurgence may not be the whole story. He suspects a recent FIA regulation change concerning engine compression ratios could be influencing the competitive order.
At the start of the season, one of the most discussed technical changes was the reduction of the permitted engine compression ratio from 18:1 to 16:1. Soon after, rival teams suggested Mercedes may have found a way to effectively exceed the limit.
Previously, compliance checks were conducted only on cold, stationary engines. Critics argued that thermal expansion during races could increase the effective compression ratio beyond the regulated threshold.
Following pressure from Audi, Honda, and Ferrari, the FIA introduced an additional test at 130°C alongside the traditional cold-engine inspection. Although the new procedure was originally scheduled for August, it was brought forward and took effect on June 1.
Because Monaco places less emphasis on engine performance, Barcelona provided the first meaningful opportunity to assess whether the rule adjustment had altered the competitive balance—and Windsor believes it may have.
Has Mercedes Lost Its Advantage?
Speaking on his YouTube channel, Windsor suggested Mercedes driver George Russell may have lacked the pace expected during the opening stint of the race.
He argued that Russell, running in clean air at the front, should have been able to build a more substantial gap over Hamilton. Instead, the Mercedes driver appeared only quick enough to maintain a modest lead.
Windsor acknowledged that Russell may simply have been driving at the absolute limit. If that was the case, he said, it could indicate that Mercedes no longer enjoys the engine advantage some believed it had before the FIA’s revised testing procedures.
According to Windsor, the Barcelona race may have offered the first genuine comparison between the leading power units under the updated regulations. However, he stressed that more races will be needed before any firm conclusions can be drawn.
The Austrian Grand Prix on June 28 is expected to provide further evidence as teams and analysts closely monitor whether Mercedes’ relative performance continues to decline.
More Challenges Ahead for Mercedes
Mercedes’ concerns could deepen with another regulation change approaching. The upcoming Addition Development and Update Opportunities (ADUO) system will allow manufacturers with less competitive power units greater freedom to develop and upgrade their engines during the season.
While Mercedes will qualify for one update allocation because Red Bull currently leads the power-unit rankings, Ferrari is set to receive two development opportunities.
That could provide the Scuderia with another valuable boost as it attempts to close the gap in both the drivers’ and constructors’ championships.