Renault Sells Viry-Châtillon to Dumarey, Ending Five Decades of Works F1 Engines

Renault has agreed to sell its Viry-Châtillon engine facility, south of Paris, to the Belgian Dumarey Group, a company that specialises in powertrain technology and development. The site built every Renault Formula 1 engine of the modern era and, until the end of last season, supplied Alpine’s works power units. The sale completes a withdrawal that began when Alpine chose to buy Mercedes engines for the new 2026 regulations. Alpine had already stopped building engines; now Renault will no longer own the place where they were built.

Fifty years of Renault horsepower at Viry

Few buildings in motorsport have a record to match Viry’s. Renault’s turbocharged engine first raced at the 1977 British Grand Prix, when Jean-Pierre Jabouille’s RS01 was mocked as the “yellow teapot” for its habit of expiring in clouds of smoke. Within a decade the turbo concept it pioneered had taken over the grid. Every manufacturer that followed was working on an idea Viry had made respectable.

The V10 years made the site’s reputation. Renault engines powered Williams to constructors’ titles in 1992, 1993, 1996 and 1997, and carried Michael Schumacher and Benetton to the 1995 championship. After a brief absence, Renault returned as a full works team and won both titles in 2005 and 2006 with Fernando Alonso. Red Bull’s four consecutive doubles from 2010 to 2013 also ran on Renault V8s designed and assembled at Viry.

The hybrid era was where the record began to fray. Renault’s 2014 power unit was badly off the pace of Mercedes, and the public friction with Red Bull that followed shaped the next decade. Red Bull rebranded its Renault engines as TAG Heuer units and then left for Honda. McLaren arrived from Honda in 2018 and departed for Mercedes in 2021. By the time Esteban Ocon won in Hungary in 2021, Alpine were the only team running the engine and its sole showcase. Viry was a factory supplying one team, with no external customers to share its costs or check its performance.

Why Renault walked away from its own engine

Renault’s leadership announced in 2024 that Alpine would end their in-house power unit programme after 2025 and become a Mercedes customer for the new rules. The reasoning was financial and blunt. Developing a 2026 power unit, with its near-even split between combustion and electrical output and its sustainable fuel requirement, demanded heavy spending for a team that had spent several seasons in the midfield. A customer supply costs a small fraction of that. It also removes the risk of starting a new formula with an engine down on its rivals, which was precisely what had happened to Renault in 2014.

The decision was not popular inside Viry. Staff protested publicly, including at the 2024 Italian Grand Prix, and argued that a French manufacturer with Renault’s F1 history should not be turning to a German rival for its engines. Renault’s answer was to redirect the site towards wider technology work under the Alpine Hypertech banner, which seemed to keep the facility in the family even as its F1 role ended.

This sale ends that compromise. Renault no longer needs to keep the building, and it has decided not to. The emotional case that a manufacturer team should build its own engine has lost to the arithmetic of what a customer deal saves, and the asset that would have made a future return easier will now belong to someone else.

What the 2026 table says about the decision

Seventeen rounds into the new regulations, the commercial logic looks hard to fault. Alpine sit sixth in the constructors’ championship on 68 points, behind RB on 100 but well clear of Haas on 30 and Audi on 23. Pierre Gasly has 41 points and Franco Colapinto 27. After finishing last in 2025, Alpine have taken a clear step forward, and they have done it on someone else’s engine.

The engine itself has been the season’s dominant force. Mercedes have won 11 of the 17 Grands Prix. They lead the constructors’ standings with 578 points, 134 clear of Ferrari, and Andrea Kimi Antonelli heads George Russell by 102 points with six rounds left, starting with this weekend’s United States Grand Prix in Austin. McLaren, also Mercedes-powered, are third. If Alpine were going to pick a supplier for the first year of a new formula, they could hardly have picked better.

Compare that with the manufacturers that took on the full cost. Audi, in their first season as a works entrant, have 23 points. Aston Martin, with Honda power, have seven. Red Bull, building their own power unit with Ford for the first time, are fourth on 332 points, a creditable debut, but Max Verstappen’s win in Singapore was only the team’s second of the season. Building an engine for a new formula is expensive and slow to pay off. Renault saw that and chose not to compete.

The cost of that choice is less visible. A customer team receives the same hardware as the works outfit, but it does not shape the engine’s design, and it cannot match chassis and power unit together from the first concept drawing. Alpine have given up the chance ever to be more than a strong Mercedes customer. With Viry sold, reversing that decision would mean building an engine operation from nothing, which is exactly what Renault was unwilling to pay for in 2024.

What Dumarey might do with Viry

The questions about the site’s future are now mostly for its new owner. Dumarey’s specialism in powertrain technology suggests the facility will keep doing engineering work rather than being run down, and Viry’s appeal to such a buyer is easy to see. It offers dynamometers, test cells, manufacturing capability and an engineering workforce used to the precision and deadlines of Formula 1. Those skills apply to hybrid systems, electrification and efficiency work across the wider automotive industry. A powertrain company acquiring a facility like this is buying capability that would take years to build from scratch.

What Dumarey plans for Viry’s motorsport role, if it has one, has not been set out. It would be wrong to assume a Formula 1 future for the site. The 2026 supplier list of Mercedes, Ferrari, Red Bull-Ford, Honda and Audi is already full of manufacturers with deep pockets, and entering as an independent engine builder in a formula this costly would be a huge undertaking. The more realistic hope is that the people and test equipment remain in use, and that some of the knowledge built over five decades stays in France rather than being dispersed.

For Alpine, the sale changes little day to day. Their cars will still be powered by Mercedes at Austin this weekend and for the remaining five rounds after that. What has changed is permanence. While Renault owned Viry, there was always a way back, however unlikely. That route has now closed, and Alpine have become a French chassis team running a German power unit. They need to win races on those terms.

That is the standard by which this decision should now be judged. Sixth in the constructors’ championship is a recovery, not an achievement. If Alpine have not converted their savings and their Mercedes supply into regular podium contention by 2028, the loss of Viry will look less like prudent housekeeping and more like Renault giving up the most valuable part of its Formula 1 history.