What F1's first collective 2026 test revealed

Formula 1 held its first collective 2026 test as all ten teams stayed in Abu Dhabi to run special 'mule cars' and evaluate Pirelli's next-generation tires. While far from the real 2026 cars, the session provided crucial initial data on tire behavior, active aerodynamics prototypes, and the performance gap teams can expect with the new regulations.

Why it matters:

This test represents the first tangible, on-track step for the entire grid towards the 2026 regulations. While the mule cars are approximations, the data collected on tire performance and aerodynamic concepts is invaluable for refining simulation models before the first real 2026 cars hit the track. It sets a foundational benchmark for the sport's next technical era.

The details:

• Performance Gap: The mule cars, running in a low-downforce configuration, were significantly slower than their 2025 counterparts. The fastest lap, set by Mercedes junior Kimi Antonelli, was 2.5 seconds off the team's Abu Dhabi GP qualifying pace, with an average deficit of nearly four seconds across the grid.
• Active Aero Prototypes: Teams got a first look at movable front wing systems, a key feature of the 2026 cars. Mercedes and Ferrari ran different prototype designs that allowed the upper front wing element to open on straights, simulating the future active aerodynamics meant to reduce drag.
• Tire Evolution: Pirelli's definitive 2026 tires, which are narrower to reduce drag and weight, were put through their paces. Teams assessed the new contact patch behavior and compound deltas, with a target performance gap of 0.7-0.8 seconds between compounds.
• Visual Changes: The test showcased several visual changes, including new Pirelli sidewall branding and exposed wheel rims (as run by Williams), ditching the current wheel covers for a lighter, classic look.

The big picture:

The mule car programme, while essential, has clear limitations. As Williams team principal James Vowles noted, the cars are "just too far away" from the 2026 reality to provide a true performance read. Crucially, they use current power units, so drivers cannot practice the complex energy recovery and harvesting techniques that will define the 2026 driving style. The real development work continues in the simulator.

What's next:

The data from this test will be fed into teams' models as they finalize their 2026 car designs over the winter. The first real track action for the new generation of cars is expected at the pre-season test in Barcelona at the end of January 2026, where the true competitive picture will begin to emerge.