Sainz career 'stalling' at Williams as Aston Martin AMR26 data emerges

Carlos Sainz’s Formula 1 career has hit a snag at Williams, with Sky F1 pundit Martin Brundle claiming the Spaniard is “down a cul-de-sac” as the team’s 2026 campaign loses momentum. The critique coincides with fresh data showing Aston Martin’s B-spec AMR26 has taken a measurable step forward in Hungary, while McLaren and Audi navigated their own divergent development paths this week.

Why it matters:

With the 2026 season approaching its decisive phase, driver futures and development races are tightening. Sainz’s ability to escape the midfield hinges on Williams’s trajectory, making Brundle’s assessment more than idle speculation. Meanwhile, Aston Martin’s mid-season gains and Audi’s deliberately conservative engine strategy underscore how teams are balancing immediate results against long-term planning.

The details:

• Sainz at a crossroads: Brundle claims Sainz is stuck in a “stalling” career phase, with the Williams project failing to deliver the platform he needs at this stage.
• Aston Martin’s B-spec gains: Former Ferrari and Williams engineer Rob Smedley analyzed the 16-part upgrade Aston Martin brought to the Hungaroring, concluding the AMR26 has moved clear of Williams in outright pace.
• McLaren pushes back: Following Lando Norris’s victory in Hungary, McLaren dismissed Mercedes technical director Simone Resta’s theory that the MCL40’s latest upgrades were not the primary driver behind its race-winning speed.
• Audi’s delayed engine push: Despite having the option to introduce a power unit upgrade this season, Audi F1 racing director Allan McNish confirmed the manufacturer will hold back its key engine revision until 2027.

What's next:

The pressure on Sainz and Williams will only intensify heading into the summer break. Aston Martin must prove its Hungary form is sustainable, while McLaren aims to consolidate its development gains. For Audi, delaying its engine upgrade until 2027 signals a patient, long-game approach as it continues to bed in its first F1 power unit.