F1's most significant rule overhaul in history begins in 2026, fundamentally altering engines, chassis, tyres and energy systems. The 1.6-litre V6 turbo hybrids will produce nearly 1,000bhp, but the power-unit architecture has shifted dramatically. Last year's 80-20 split between internal combustion engine (ICE) and electrical power has narrowed to a much closer 52-48.

Crucially, the complex MGU-H energy recovery system from the turbo shaft is gone, leaving only the MGU-K on the rear axle. This change aimed to attract more manufacturers like Audi, GM and Ford, but leaves the cars energy-starved. The battery size remains similar, forcing constant charging and discharging cycles.

Teams must now manage energy recovery meticulously, balancing power deployment across the lap. The chassis has also reverted to a 'step-plane' design, abandoning the 2022-25 ground-effect cars. The cars are narrower, smaller and about 30kg lighter, improving maneuverability but initially running two seconds slower in testing.

Front and rear wings have been reduced in width by 25-30mm to combat drag, eliminating traditional DRS and introducing a new 'overtake' mode using electrical boost. Drivers face a new challenge, sometimes sacrificing corner speed to preserve energy for acceleration out of slow bends.