Brundle: Mercedes would delay engine info to McLaren

Sky Sports pundit Martin Brundle suggests that if he were in charge at Mercedes, he would give customer team McLaren crucial power unit information "as late as they can get away with," highlighting the fierce internal rivalry between the two Mercedes-powered teams. This strategic withholding, while operating within the strict regulations, would aim to maximize Mercedes' own chassis integration advantage for the new 2026 car.

Why it matters:

The dynamic between a works team and a top-performing customer team is a unique and often tense aspect of Formula 1. Mercedes has supplied the engine that powered McLaren to the last two Constructors' Championships, a fact Brundle implies is a bitter pill for the fiercely competitive Mercedes team principal Toto Wolff to swallow. As both teams enter 2026 on a theoretically level aerodynamic playing field, any marginal advantage in chassis-engine integration becomes critical, turning the timeline of information sharing into a potential battleground.

The Details:

• McLaren has won the Constructors' Championship in 2024 and 2025 using Mercedes power units, with Lando Norris securing the 2025 Drivers' title.
• Brundle believes Toto Wolff "desperately" wants to beat McLaren this season and would use every regulatory allowance to gain an edge.
• The core advantage for Mercedes is the simultaneous design of the power unit and the W17 chassis. McLaren, as a customer, must wait for Mercedes' PU specifications and then adapt their MCL40 chassis around them.
• Regulatory Framework: Formula 1's power unit regulations mandate that all units supplied by a manufacturer must be identical in specification and software, with only minor differences in fuel and oil allowed. This prevents a works team from providing a substandard product.
• However, the regulations do not specify when detailed technical information must be shared with customer teams, leaving room for strategic delay.
• Brundle's commentary underscores that while Mercedes would prefer to win themselves, losing to another Mercedes-powered team like McLaren is the next best outcome from a corporate perspective.

What's next:

The 2026 season sets the stage for a fascinating intra-Mercedes battle. The new aerodynamic regulations reset the field, but the underlying power unit integration race continues. Watch for how the performance gap—or lack thereof—between the W17 and the MCL40 unfolds in early testing and races. Any significant disparity may fuel further discussion about the practical realities of the “identical engine” rules and the hidden advantages of being the factory team.