Cadillac has confirmed its IMSA and WEC driver rosters for the 2027 endurance racing season.

Cadillac Racing has announced its driver lineup for the 2027 season, outlining its plans for the IMSA WeatherTech SportsCar Championship and the FIA World Endurance Championship (WEC). The manufacturer will build on its successful 2026 IMSA campaign while introducing changes to its Hypercar program.

The announcement comes with two rounds remaining in the current WEC season. Cadillac will continue competing with its V-Series.R prototype, relying on established driver partnerships and additional endurance-racing experience to prepare for another demanding year.

Cadillac Confirms Three IMSA GTP Lineups

Cadillac will enter its fifth season in IMSA GTP competition with three V-Series.R programs. The driver combinations retain experienced full-season pairings while adding specialist drivers for endurance events.

Cadillac Whelen: No. 31

Jack Aitken and Frederik Vesti will compete throughout the season, with Earl Bamber joining for endurance races. The fourth driver for the Rolex 24 at Daytona has yet to be announced.

The No. 31 Cadillac Whelen will retain Jack Aitken and add Frederik Vesti as its full-season pairing for 2027.

Cadillac Wayne Taylor Racing: No. 10

Ricky Taylor and Filipe Albuquerque will form the full-season pairing, with Will Stevens supporting the team during endurance events. The combination gives the No. 10 entry continuity while adding experience for longer races.

Cadillac Wayne Taylor Racing: No. 40

Jordan Taylor and Louis Deletraz will drive the No. 40 throughout the season, with Norman Nato joining for endurance races. Cadillac will therefore have three distinct GTP entries, each with a designated full-season combination.

Cadillac’s stated objective is to carry its 2026 championship momentum into the 2027 campaign and compete for further titles. The Rolex 24 at Daytona will be an early test of the revised lineups, particularly as the teams prepare for one of the most demanding events on the IMSA calendar.

Antonio Felix da Costa Joins Cadillac’s WEC Program

Cadillac Hertz Team JOTA will continue campaigning the V-Series.R in the WEC Hypercar class for a third year. Its announced roster for the No. 12 and No. 38 cars includes Antonio Felix da Costa, Earl Bamber, Jack Aitken, Norman Nato, Ricky Taylor and Will Stevens.

Cadillac Hertz Team JOTA will introduce Antonio Felix da Costa and Ricky Taylor as part of its 2027 driver changes.

Felix da Costa brings extensive experience across prototype and GT racing. The Portuguese driver has won the FIA World Endurance Championship and claimed a class victory at the 24 Hours of Le Mans. His previous experience with JOTA also gives him familiarity with the team’s operations.

Ricky Taylor is another addition with established ties to Cadillac. He previously raced with Cadillac Hertz Team JOTA at Circuit of the Americas earlier in 2026 while Alex Lynn recovered from surgery. Taylor has recorded 32 victories and 76 podium finishes in his IMSA career, according to the figures cited in the announcement.

The combination of Felix da Costa and Taylor adds experience and technical knowledge to Cadillac’s WEC effort. However, the announcement lists the six drivers across the two cars without specifying their individual No. 12 and No. 38 assignments. Those pairings should not be assumed until Cadillac confirms them.

Alex Lynn and Sébastien Bourdais to Leave the Team

The 2027 changes also mark the end of Alex Lynn and Sébastien Bourdais’ current chapter with Cadillac Hertz Team JOTA. Both drivers will depart the team at the end of the 2026 season.

Cadillac credited the pair with important contributions to the development of its endurance-racing program. Their departures represent a significant change to a lineup that has included experienced competitors in the WEC’s top Hypercar category.

Alex Lynn and Sébastien Bourdais will leave Cadillac Hertz Team JOTA at the end of the 2026 season.

Cadillac’s 2027 plans combine continuity in IMSA with a revised driver roster in the WEC. The manufacturer will aim to translate that experience into results across both championships, beginning with the Rolex 24 at Daytona and the next WEC campaign. The remaining details to watch include the fourth driver for the No. 31 at Daytona and the final allocation of drivers between the two WEC entries.

James Vowles says Williams still faces major structural problems, with basic computer tasks taking minutes and aerodynamic processes running twice as slowly as those of leading rivals.

Williams is still working to overcome years of underinvestment, and team principal James Vowles has offered a striking example of the scale of the challenge. According to the British executive, a routine computer operation that should take one second can require around four minutes at the Formula 1 team.

The problem goes beyond the performance of the car itself. Williams must also improve its software, internal systems and development processes if it wants to close the gap to Formula 1’s leading constructors. Vowles believes rebuilding that infrastructure will take time, even with the team’s ongoing investment.

Williams Takes Twice as Long to Develop Aerodynamic Ideas

Vowles has repeatedly emphasized that Williams is still dealing with the consequences of decades of insufficient investment. The team cannot eliminate those weaknesses overnight, particularly under Formula 1’s budget cap, which limits how quickly resources can be deployed.

The team principal explained that some aerodynamic development processes take approximately twice as long at Williams as they do at leading competitors. From the moment an aerodynamicist develops an idea to the point when it can be evaluated in the wind tunnel, the process remains significantly slower.

Williams is working to improve its aerodynamic development processes as it attempts to close the gap to leading F1 teams.

That delay can affect the team’s ability to introduce improvements throughout a season. Even when engineers identify a promising concept, slower development and testing can postpone its arrival on the car, potentially reducing the team’s ability to respond to competitors.

The challenge is therefore not simply to produce better aerodynamic ideas. Williams must also build a technical structure capable of turning those ideas into usable components more efficiently.

A One-Second Computer Task Takes Four Minutes

One of Vowles’ most revealing examples concerns a routine operation used in aerodynamic design. Mirroring an object from one side of the car to the other should be a straightforward computer task, yet Williams’ systems can take approximately four minutes to complete it.

The team principal described how an engineer can click a button and then wait long enough to make a cup of tea. For a task that should take about one second, the delay illustrates how outdated software and internal systems can disrupt everyday work.

Slow internal software can add unnecessary waiting time to routine engineering work at Williams.

Vowles explained that the problem is not an isolated technical fault. Instead, it reflects years of underinvestment in the systems supporting the team’s engineers. He suggested that the two examples he described represent only a small part of a much larger collection of inefficiencies.

Those delays may appear insignificant individually, but their cumulative effect can be substantial. When hundreds of small problems affect different departments, they can consume working hours and slow the development process across an entire organization.

Williams Faces Hundreds of Small Problems

Inside Williams, the accumulated obstacles have been described as “a thousand paper cuts.” The phrase captures a structural problem in which no single issue explains the team’s difficulties, but numerous small inefficiencies combine to create a significant disadvantage.

These weaknesses can affect everything from computer-aided design to aerodynamic development and the speed at which engineering decisions become physical parts. Improving one system may help, but the wider challenge requires changes across multiple departments.

Williams needs improvements across its engineering systems and factory operations, not just a faster car.

Vowles estimates that the team will need another 12 to 18 months to bring many of these problems under control. Even then, further weaknesses may emerge as the organization improves and identifies new areas where it falls behind the leading teams.

The timeline highlights the scale of the task facing Williams. Progress depends not only on investment in the car but also on improving the tools, processes and working environment that allow engineers to develop it.

James Vowles’ Long-Term Plan for Williams

Vowles joined Williams as team principal in 2023 after spending years at Mercedes, giving him direct experience of the systems and working methods used by a championship-winning organization. That background provides a benchmark for the improvements he wants to introduce at Williams.

However, he has stressed that a team cannot reverse two decades of underinvestment in just three years while operating under a budget cap. Infrastructure upgrades, software improvements and more efficient development processes all require time and careful prioritization.

For Williams, the objective is to create an organization that can develop upgrades and respond to technical challenges at a speed comparable with its leading competitors. Until that happens, even strong engineering ideas may take too long to translate into performance on track.

The four-minute computer task illustrates why Williams’ recovery involves much more than the design of its next Formula 1 car. Closing the gap requires a faster, more reliable organization behind it, with improvements across hundreds of small processes that collectively influence performance.

Carlos Sainz believes Formula 1’s new regulations are widening the performance gap, although he also sees positive changes.

Carlos Sainz has raised concerns about the competitive balance of Formula 1 under its new technical regulations, arguing that the grid is increasingly divided into distinct performance groups. The Williams driver believes the current situation could be described as a championship with two or even three competitive tiers, with the leading teams separated from the midfield and the struggling outfits at the back.

The debate over the latest power unit regulations has intensified since the start of the season. Drivers have questioned several aspects of the new cars, while software problems in Malaysia added further pressure on the sport to examine how the rules are working in practice. Sainz’s latest comments highlight another concern: whether the regulations are creating a wider gap between teams rather than bringing them closer together.

Carlos Sainz believes the new regulations have contributed to a more divided Formula 1 grid.

Sainz Sees Three Different Competitive Groups

Sainz points to the results on track as evidence that Formula 1 is becoming increasingly divided. In his assessment, the leading four teams currently form one group, while the rest of the field struggles to match their performance. He also believes a third tier can be identified among teams that remain significantly behind the midfield.

Cadillac, competing in its first Formula 1 season, and Aston Martin have faced particularly difficult challenges. Both have struggled to keep pace with the more competitive teams, although their circumstances differ. Cadillac is building its operation as a new entrant, while Aston Martin has been dealing with significant performance limitations.

History shows that major regulation changes can create substantial gaps between teams. As a new technical cycle develops, some manufacturers and constructors find competitive advantages earlier than others. Those differences can gradually shrink as teams improve their cars, refine their processes and learn how to extract more performance from the rules.

However, the central question is whether the current regulations will allow the field to converge quickly enough to maintain close racing throughout the grid.

Sergio Perez Questions the Budget Cap

Sergio Perez has offered a different perspective on the performance gap. The Cadillac driver argues that the team’s difficulties cannot be explained by its power unit alone. He also points to the challenges faced by a new and relatively small operation competing against established Formula 1 organizations.

Perez believes the current budget cap can place smaller teams at a disadvantage. During his time at Red Bull, he recalls an environment in which the team introduced upgrades almost every race weekend and concentrated its resources on improving performance.

Sergio Perez believes smaller teams can face additional challenges under Formula 1’s financial restrictions.

Aston Martin Highlights the Limits of Spending

Aston Martin’s struggles also illustrate why financial resources do not automatically translate into competitive performance. The team has faced significant difficulties this season, with Honda’s power unit identified as one of the key challenges, particularly early in the campaign.

A competitive Formula 1 car depends on several elements working together. Engine performance, aerodynamics, chassis design, reliability and the efficiency of the organization all influence the final result. Strong investment can help address weaknesses, but it cannot immediately eliminate technical problems or replace the time needed to develop a competitive package.

The situation also reinforces the importance of cooperation between constructors and power unit manufacturers. Even when a team has substantial resources, a lack of performance or reliability in one major area can limit the potential of the entire car.

Aston Martin’s early-season difficulties demonstrate that financial investment alone cannot guarantee performance.

For Formula 1, these challenges raise broader questions about how the current technical regulations affect the competitive order. The power unit rules, the financial framework and the teams’ ability to develop their cars will all influence how quickly the gaps can narrow.

Sainz Sees Positive Changes Despite the Problems

Despite his concerns, Sainz does not believe the new regulations have been negative in every respect. The Williams driver has highlighted increased overtaking as one of the potential benefits of the current rules, suggesting that the sport should assess the changes individually rather than dismissing the entire concept.

Sainz acknowledges that teams, power unit manufacturers, the FIA and Formula One Management are all trying to make the most of a framework established several years ago. The challenge now is to evaluate which elements are improving the racing and which are creating unwanted consequences.

His comments point toward a broader review of the regulations as Formula 1 considers its direction through 2030. Any future adjustments will need to balance competitive fairness, racing quality, technical challenges and the commercial interests of the championship.

The immediate priority is to understand why some teams are progressing more effectively than others and whether changes to the rules could address the biggest weaknesses without undermining the improvements already achieved. For Sainz, the sport must recognize both the advantages and disadvantages of the current system before deciding how to move forward.

Formula 1’s competitive order is not necessarily fixed for the remainder of the regulation cycle. However, the concerns raised by Sainz and Perez underline the importance of ensuring that the new rules deliver compelling racing across the grid, rather than leaving a growing number of teams fighting from a significant disadvantage.