The 2026 Formula 1® power unit regulations have introduced a new level of technical complexity that is proving challenging for customer teams like McLaren. While the FIA mandates that all teams using a particular engine supplier receive the same hardware specification as the works teams, the reality on track shows that performance differences now hinge more on how teams manage and exploit the power unit’s sophisticated systems.
McLaren, which runs Mercedes power units, is a clear example of this dynamic. Despite having access to identical hardware as Mercedes’ works team, McLaren has struggled to fully unlock the potential of the new power units. The increased role of the MGU-K and the advanced energy management software require deep expertise and experience, areas where works teams hold a distinct advantage. Andrea Stella, McLaren’s team principal, has acknowledged the ongoing performance gap related to power unit exploitation and confirmed that technical discussions with Mercedes High Performance Powertrains are continuing.
The challenge is compounded by factors such as gearbox ratio choices, which were initially based on earlier engine specifications and now add complexity to optimizing performance under the new regulations. Telemetry data reveals that Mercedes drivers like George Russell and Kimi Antonelli are able to use advanced techniques—such as lifting off the throttle before the finish line—to gain marginal advantages, methods not yet available to McLaren’s Lando Norris.
McLaren is currently awaiting an upgrade to the latest Mercedes power unit specification, which is expected to focus on reliability rather than a direct performance increase. This situation highlights how, under the 2026 regulations, the advantage lies less in the physical engine components and more in the accumulated expertise in developing, calibrating, and managing the complex hybrid systems.
The 2026 power units place a greater emphasis on software and energy recovery systems, shifting the competitive balance toward works teams that have the resources and experience to fine-tune these elements effectively. For customer teams, this means that matching the pace of their engine suppliers involves overcoming a steep learning curve in power unit management and integration.
Andrea Stella’s comments underline the technical hurdles McLaren faces in this environment. While the hardware parity mandated by the FIA ensures a level playing field in terms of engine specification, the practical exploitation of these units remains a significant challenge. The ongoing dialogue between McLaren and Mercedes High Performance Powertrains reflects the complexity of adapting to the new regulations and the importance of software and system management in modern Formula 1® performance.
This development underscores a broader trend in the sport where success increasingly depends on mastering intricate technology rather than relying solely on hardware advantages. McLaren’s experience with the 2026 power unit rules offers insight into the evolving technical landscape of Formula 1® and the challenges faced by customer teams aiming to close the gap with their engine suppliers.
