Why Ferrari’s power unit reliability will only be truly judged at the Bahrain F1 tests. Ferrari completed a strong and encouraging first 2026 F1 test in Barcelona.

With the five-day closed-door test in Barcelona now completed, marking the opening chapter of the 2026 Formula 1 season, the first meaningful data is beginning to emerge, allowing teams and analysts to form an initial picture of the competitive landscape. These are, however, broad and preliminary evaluations, because at this stage of the year lap times count for very little, if anything at all. Teams are still exploring brand-new cars designed from a clean sheet of paper, and outright performance is not yet the priority.

The only parameter that truly matters during these early tests is the number of laps completed, a key indicator used to assess reliability and the overall readiness of each project ahead of the first Grand Prix of the season. In Spain, the primary objective for all teams—and especially for the power unit manufacturers—was to verify the correct functioning of the new hybrid power units, gathering essential data that will form the foundation for future development.

Mercedes and Ferrari among the hardest workers

Looking at the standings for total laps completed, Mercedes emerged as the most industrious team, finishing the test with an impressive 500 laps. This figure confirms that the Brackley-built power unit is capable of covering significant mileage without major issues, reinforcing the positive rumours that have circulated in recent months about the strength of the Mercedes project.

Equally encouraging, particularly in light of the speculation surrounding reliability in recent seasons, were the numbers posted by Ferrari. The Scuderia completed 437 laps, equivalent to roughly 2,700 kilometres, a workload that provided valuable confirmation of reliability and allowed engineers to collect a substantial amount of data. For now, this total can be considered satisfactory for the Italian team, suggesting that the 2026 power unit has been built on solid foundations, at least from a durability standpoint.

That said, the true robustness of Ferrari’s power unit, just like that of its rivals, can only be fully confirmed after the Bahrain tests. It is at the Sakhir circuit that any potential long-distance durability issues are most likely to emerge.

Bahrain will be crucial: here’s why

Under the 2026 regulations, each driver is allowed to use a maximum of three complete power units over the course of the season before incurring penalties, with even stricter limits applied to control electronics and battery packs, both capped at two. Using rough but representative calculations, each power unit will need to cover around 6,000 kilometres to complete the season within the limits set by the FIA.

For this reason, understanding exactly how many kilometres a single unit can realistically cover will be vital for Ferrari, as well as for every other manufacturer on the grid. Based on this requirement alone, the Bahrain tests will be decisive in providing reliable and meaningful answers regarding real-world power unit durability.

According to information from a well-informed source, Ferrari is expected to run the same power units used in Barcelona during the Bahrain test. This approach would allow the team to accumulate the necessary mileage and evaluate, in a clear and comprehensive manner, the long-term behaviour and any potential issues of the new 067/6 power unit under sustained running conditions.