Could Andretti partner with Honda F1 power units?

With Andretti Autosport and General Motors officially declaring their intention to follow the FIA's Expression of Interest process, what is their likely power unit solution if their bid is successful?

Following Mohammed Ben Sulayem's confirmation that the FIA will look into opening an official route for new teams, the American outfit reiterated their long held desire to join the F1 grid.

Backed up by General Motors and their Cadillac brand, the American outfit have many supporters, despite historical resistance to new teams from members of the current F1 grid, and a frosty response from F1 themselves.

The current - and incoming for 2026 - F1 power unit suppliers are much less likely to object to more teams, with the joint venture confirming engine plans are already in place if their bid is successful.

"We have a signed agreement with a power unit supplier to begin with," said General Motors President Mark Reuss when questioned by RacingNews365.com.

"Then as we move forward, we'll bring a lot of our expertise to create things for the future as well."

As has long been reported, Andretti are likely to rely on Renault power units if they secure an F1 entry before the 2026 season, aided by a regulation which stipulates that the power unit supplier with the fewest teams is obliged to supply an engine-less team.

How likely is a Honda power supply?

In recent months, Honda have renewed their interest in Formula 1, and are one of the six suppliers who have announced their intention to be part of the new cycle of power units from 2026 onwards.

Their supply with Red Bull runs until 2025, with the Milton Keynes team aiming to have progressed the Red Bull Powertrains (RBPT) arm of their business by 2026.

GM has an existing relationship with Honda on the electric vehicles side, prompting speculation on a collaboration from 2026 onwards.

GM President Mark Reuss took the opportunity to praise their partnership with Honda, but warned that they are also more than happy to compete against the Japanese supplier.

"Obviously we do have a large partnership with Honda with EVs, and we also compete against Honda in series like IndyCar (through the Chevrolet brand).

"So we do have that natural respect and relationship - which is not problematic at all, but we'll talk about the engine at a later date."