Central to the changes are new power unit regulations, with a move to fully sustainable fuel and tweaked turbo-hybrids, eradicating the MGU-H, having brought Audi in and convinced Honda to do a U-turn on leaving.
But it is not only the engines that are new, and there are going to be major revisions to the cars too in a bid to ensure the racing is as good as possible.
While there have been some broad ideas discussed at various times, the FIA has so far not revealed much about the specific details of what is coming on the chassis side.
That has changed now with the governing body's head of single-seaters Nikolas Tombazis talking at length to selected media, including Autosport, about where things are heading for 2026.
Smaller, lighter and more nimble machinery
One of the biggest complaints about the current cars is that they are so heavy. This not only makes them less responsive, but it is also punishing on tyres – which are critical to the spectacle.
As the FIA moves towards delivering the first draft of outline regulations by the end of next June, it is clear car dimensions are going to change for 2026.
Tombazis has explained that the basic layout of an F1 2026 car is defined and will be different to what we have at the moment.
The cars will be shorter, with the wheelbase likely trimmed down to 3400mm from the current maximum 3600mm. The cars will also be narrower by 10cm, so will be reduced from 2000mm to 1900mm.
Source: Autosport