Williams needs a diet as James Vowles admits: “Excess weight is a serious problem”. Williams FW48 struggles with weight issues, Vowles confirms.

A difficult start to the season

Williams had reason for optimism after finishing 5th in the Constructors’ Championship last season, but the 2026 campaign has begun with significant challenges for the historic Grove-based team. The FW48 even missed the Barcelona tests due to delays in the car program and a failed crash test. After the first two races of the season, Williams sits temporarily in 9th place in the team standings, thanks to Carlos Sainz’s only points finish of 7th at the Chinese Grand Prix. The Shanghai weekend was particularly tough, with Alex Albon unable to take the grid due to technical issues.

FW48 on the scales

Looking ahead to the next Grand Prix in Japan, the main problem holding Williams back has started to become clear. Team principal James Vowles confirmed that the FW48 is overweight compared to the minimum weight set by the technical regulations (770 kg), which inevitably affects performance. Early rumors after the Barcelona tests suggested the FW48 was only 0.4 kg heavier than the Mercedes, but Vowles’ statements to the media strongly contradicted this, with the British engineer specifying the actual excess weight as 20 kg.

The impact on performance

This significant weight issue has serious implications for the FW48’s on-track competitiveness. Carrying 20 kg over the minimum weight limit affects acceleration, braking, and tire wear, putting the team at a disadvantage relative to rivals who have already optimized their cars. Addressing this problem will be crucial for Williams to improve results and regain competitiveness in the Constructors’ Championship as the season progresses.

Looking forward

As the team prepares for the Japanese Grand Prix, all eyes will be on how Williams manages the FW48’s weight problem and whether adjustments can be made to reduce its impact. With only two races completed and the season still in its early stages, there is time for the team to adapt and find solutions, but the weight issue will remain a critical focus for the engineers and drivers alike.

Based on the content of these recent technical revelations, the coming months will define whether Williams can salvage their 2026 campaign. Reducing a 20kg surplus is a monumental task that will likely require multiple major update packages throughout the European leg of the 2026 Formula 1 season.