Cadillac's Formula 1 team principal has robustly defended the legality of their Ferrari power unit, as a significant pre-season controversy over engine regulations intensifies among manufacturers. Graeme Lowdon, leading F1's first new constructor since 2016, has stated unequivocally that the Cadillac team possesses a "fully legal engine" through its partnership with Ferrari, amidst complaints from rival manufacturers to the sport's governing body.
Engine Row Erupts Ahead of 2026 Season
With just days remaining before the first pre-season test in Barcelona, a major dispute has emerged between the five engine manufacturers in Formula 1. Ferrari, Audi, and Honda have formally complained to the FIA regarding concerns that Mercedes and Red Bull may have discovered a potential "loophole" within the sweeping new technical regulations being introduced for the 2026 campaign.
Compression Ratio Controversy Explained
The controversy centres specifically on the compression ratio of the internal combustion engine, which represents the relationship between the cylinder's maximum and minimum volume. Under the fresh regulations, a strict 16:1 ratio is mandated when measured at "ambient temperature" with the vehicle stationary.
However, speculation within the paddock suggests that Mercedes and Red Bull might be exploiting principles of thermal expansion. This engineering approach could effectively allow the compression ratio to operate closer to the previous regulation limit of 18:1 when the car is running on track, potentially delivering a performance advantage estimated at up to 0.3 seconds per lap.
The three complaining manufacturers have consequently written to the FIA, insisting that any ratio exceeding the stipulated 16:1 figure would constitute a breach of the rules. A crucial meeting between all engine manufacturers is scheduled to take place to address these mounting concerns.
Cadillac's Confident Stance
In contrast to the brewing dispute, Cadillac team boss Graeme Lowdon has expressed complete confidence in the legality and partnership with Ferrari. Speaking to Sky Sports News, Lowdon provided a clear endorsement of their power unit supplier.
"What I'm very confident and happy about is we have a fully legal engine," Lowdon stated. "With these engines, the combustion is not allowed to take place at a compression ratio above 16 to 1. Without going into too many details, we know that Ferrari have completely followed the rules where that stands. That gives us a lot of confidence."
He further elaborated on the technical collaboration, emphasising the clarity of the regulations from his perspective. "In terms of performance, we work and support our power unit partner to the absolute maximum. We're very happy with the relationship. I can't really talk for other people's power units or how they've interpreted the regulation. But to me, it's extremely clear it's there in black and white."
Building Partnerships for the Future
The Cadillac F1 team, operated by its parent corporation General Motors, is currently utilising Ferrari power units as part of its initial entry into the sport. The long-term strategy involves the American manufacturer developing and producing its own engines from 2029 onwards.
Lowdon praised the existing partnership, highlighting Ferrari's iconic status and technical support. "I've worked with Ferrari a number of times before," he added. "They're great partners. It's an iconic name in Formula 1 as well. All of the people in that team are real racers, and we welcome them into the Cadillac Formula 1 team. They don't just provide us with a power unit, they provide us with some technical support in terms of people who join the team. It's great to have them on board."
Pre-Season Preparations Underway
Amidst the regulatory debate, the Cadillac team has been actively preparing for its maiden F1 season. The squad completed its first-ever laps with its new car during a filming day at Silverstone last week. This milestone precedes a private testing week scheduled in Barcelona, as all eleven teams finalise their preparations.
The 2026 Formula 1 World Championship is set to commence under the new regulations with the season-opening Grand Prix in Australia on 8th March, promising a potentially reshuffled competitive order.
