The Renault-owned Alpine team will use Mercedes engines in Formula 1 from the 2026 season.
The deal, which follows the decision in September to end Renault’s own engine programme in 2025, runs until at least the end of 2030.
Alpine will also use Mercedes-supplied gearboxes and rear suspension from 2026, although the team are exploring their options to design these items in-house form 2027.
The move, which is aimed at increasing competitiveness after years of the Renault engine failing to match up to its rivals, follows a shift in focus at Alpine, after many years of failing to achieve its ambitions in F1.
When Renault re-entered F1 as a team owner in 2016, it set itself a five-year target to be competing for world titles.
This was recalibrated when the team was rebranded as Alpine in 2021, and a new target to achieve the same aim was set - in 100 races’ time.
But the chief executive who set that target, Laurent Rossi, was fired in 2023 and since then there has been major management upheaval at Alpine, with a series of leading figures departing the team.