# McLaren performance challenges in Formula One

> Live situation record from CLSTR: https://clstr.news/situations/mclaren-performance-challenges-in-formula-one
> Updated: 2026-10-02T07:11:16.000Z. Sources: 18. Developments: 2.

Lando Norris reported difficulties with the McLaren MCL40 during a qualifying session at the Sepang International Circuit. Norris identified a deficit in straight-line speed as the primary issue, noting that the car loses time during acceleration on long straights despite strong corner exits. 

Team principal Andrea Stella confirmed the deficiency, stating it can cost between “one and two tenths of a second per lap.” The team attributed the performance gap to the Mercedes power unit not being fully optimized for the car. Technical limitations and high tyre degradation due to the abrasive track surface are expected to impact McLaren’s race strategy.

## Claims

- McLaren recorded a net loss in 2025 despite winning both the Drivers' and Constructors' championships. (corroborated by 2 sources)
- Lando Norris secured the Drivers' Championship for McLaren in 2025. (corroborated by 2 sources)
- The team's turnover reached approximately £588.5 million in 2025. (single source)
- The 2025 net loss was reported as £17.36 million GBP. (single source)
- The team's cost of sales rose significantly to £534.3 million in 2025. (single source)

## Timeline

### 2026-10-02: Lando Norris struggles with straight-line speed at Sepang

Lando Norris faces frustration at the Sepang Grand Prix after qualifying sixth, citing a critical lack of straight-line speed caused by Mercedes power unit issues.

16 sources. https://clstr.news/cluster/mclaren-racing-reports-net-loss-despite-2025-f1-championship-double

### 2026-09-29: Williams Racing halves annual financial loss in 2025

Williams Racing halved its annual financial loss to £25.115 million in 2025, driven by improved F1 championship standings and increased turnover, despite a decrease in total cash reserves.

4 sources. https://clstr.news/cluster/williams-racing-halves-annual-financial-loss-in-2025

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Cite as: McLaren performance challenges in Formula One. CLSTR, https://clstr.news/situations/mclaren-performance-challenges-in-formula-one