During pre-season testing, Mercedes ran different versions of its power unit across the teams it supplies. McLaren, Williams and Alpine were given a proven specification to prioritise reliability and ensure uninterrupted test programmes under the sport’s new regulatory cycle.
Meanwhile, the factory operation retained exclusive access to the latest development iteration of the M17 E Performance engine, using its W17 chassis to push performance boundaries.
The split approach was partly logistical. Producing and distributing components for a single team is considerably simpler than manufacturing identical parts for four separate operations.
Variations between the engines were understood to be minor, but the strategy allowed Mercedes to balance development and durability ahead of the homologation deadline on 1 March.
Under Formula 1’s technical framework, strict parity is mandated. Article 1.4 and Appendix 4 require each manufacturer to submit a single homologation file covering all supplied teams.
Differences are limited to fuel and oil specifications, along with wiring. Crucially, software settings must remain identical to prevent customers being denied access to higher performance modes.
“I think that’s part of the strategy that HPP deployed in terms of supplying the hardware, the power units, to the customers and to the works team,” said McLaren team principal Andrea Stella.
“It’s certainly been an intense and pushed programme for power unit manufacturers, not only for the teams from a chassis point of view, but what is important is that the right specification is available for race one.
“I have to say that the power unit we had during this test behaved extremely reliably and gave us the opportunity to do all the tests that we wanted to do, and also learn about the interaction between power unit, chassis and driver.”
