A former Mercedes Formula 1 engineer has suggested that Ferrari are unlikely to avoid scrutiny entirely as the FIA prepares to tighten its evaluation of controversial engine design interpretations ahead of the Monaco Grand Prix weekend, potentially reshaping the competitive balance between top teams.
Mark Slade, who previously worked within the Mercedes technical structure, believes that while Mercedes may be more heavily impacted by regulatory attention, Ferrari are also expected to experience similar—though potentially less severe—consequences under the same technical assessments.
Mercedes engine discussion triggers wider scrutiny in Formula 1 paddock
At the centre of the discussion is a long-standing debate over Mercedes’ interpretation of engine compression ratio behaviour under varying thermal conditions. At the start of the season, speculation intensified that Mercedes had found a way to optimise performance by operating differently under cold and hot conditions while still remaining within the formal limits of FIA regulations.
Mercedes team principal Toto Wolff and the manufacturer received prior clarification from the FIA before the season began, a move that reportedly caused frustration among rival teams who believed the interpretation required stricter intervention.
Ferrari team principal Fred Vasseur publicly criticised the FIA’s handling of the matter, expressing the view that stronger action should have been taken earlier. Fred Vasseur had expected that the governing body might restrict Mercedes’ approach entirely, particularly regarding the suspected compression ratio strategy.
However, the FIA has consistently defended Mercedes, stating that no regulatory breach has occurred. Despite this, upcoming technical evaluations—particularly the so-called “hot test” in Monaco—are expected to place renewed focus on how different power unit philosophies behave under extreme conditions.
Ferrari also under potential scrutiny according to former Mercedes engineer
Speaking in an interview with Peter Windsor, former Mercedes engineer Mark Slade outlined his expectations for how both Mercedes and Ferrari may be affected by the FIA’s continued analysis of engine behaviour.
According to Mark Slade, Mercedes are likely to lose some of the advantage they may have gained through their current engine interpretation. However, he also suggested that Ferrari’s approach to engine architecture could come under similar examination, particularly if measurable performance gains are identified.
Mark Slade explained that Ferrari have adopted steel cylinder head designs, which may provide structural rigidity benefits but could also influence thermal expansion characteristics within the power unit.
He indicated that when the issue of Mercedes’ compression ratio strategy first became a topic of discussion, it was understood that Ferrari’s engineering direction may also have been partially influenced by the desire to extract secondary performance gains from material behaviour differences.
While Ferrari have publicly framed their design choices as primarily focused on improving mechanical strength and reliability, Mark Slade suggested that there may also be subtle performance implications linked to compression behaviour.
He added that if any such advantages are deemed significant enough under FIA analysis, Ferrari could be required to adjust their internal combustion engine settings in line with updated regulatory interpretations following the next stages of the season.
Mark Slade concluded that while Mercedes are likely to face a proportionally greater reduction in performance benefit, Ferrari cannot assume they will remain unaffected by regulatory clarification, stating that the Scuderia may also need to carry out corrective development work.
Ferrari development push ahead of Monaco Grand Prix raises strategic risk
With the Monaco Grand Prix regulatory assessment still several weeks away, Ferrari face a strategic decision regarding how aggressively to continue their current development trajectory.
The team has been working intensively during the recent break to refine multiple areas of performance, aiming to reduce the gap to Mercedes and strengthen competitiveness across a wider range of circuits.
Recent adjustments to Formula 1 regulations, particularly those related to race start procedures and power unit management, have introduced additional variables that could influence Ferrari’s early-season strengths. Some analysts believe these changes may reduce the effectiveness of Ferrari’s previously strong launch performance relative to rival teams.
Internally, Ferrari remain optimistic that their development direction will deliver measurable gains, with expectations that the updates introduced ahead of the Miami Grand Prix will help shift the competitive order more in favour of Charles Leclerc and Lewis Hamilton.
Both Charles Leclerc and Lewis Hamilton are expected to play a key role in evaluating the effectiveness of Ferrari’s latest upgrades, as the Maranello team continues to push for improved consistency and closer performance to Mercedes in both qualifying and race conditions.
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