Overview

• The 11 September meeting in London to decide the next engine era has been pushed back indefinitely after organizers concluded a deal was unlikely.
• The FIA has been advocating a modern 2.4‑liter V8 paired with a simplified KERS‑style hybrid and sustainable fuels, with an earliest start target floated for 2029.
• Positions diverge on architecture, with Mercedes, Ferrari, RB Powertrains and Cadillac favoring a naturally aspirated V8, while Audi argues for a twin‑turbo V8.
• Preferred start dates also differ: RB Powertrains and Cadillac are open to 2029, Mercedes and Ferrari lean to 2030, and Audi and Honda want the 2026 rules to run the full five years to 2031.
• A pre‑2031 change would require a broad supermajority including manufacturers, whereas from 2031 the FIA could impose its preferred rules if agreement remains out of reach.