F1 cars in 2026 will be smaller, safer, more nimble, more sustainable

Earlier today, the Fédération Internationale de l'Automobile laid out the direction for Formula 1's next set of technical regulations, which will go into effect in 2026. It will be the second big shakeup of F1's technical regs since 2022 and involves sweeping changes to the hybrid powertrain and a fundamental rethink of how some of the aerodynamics work.

"With this set of regulations, the FIA has sought to develop a new generation of cars that are fully in touch with the DNA of Formula 1—cars that are light, supremely fast and agile but which also remains at the cutting edge of technology, and to achieve this we worked towards what we called a 'nimble car' concept. At the center of that vision is a redesigned power unit that features a more even split between the power derived from the internal combustion element and electrical power," said Nikolas Tombazis, the FIA's single-seater technical director.

Didn’t we just get new rules?

It feels like F1 only just got through its last big rule change with the (re)introduction of ground-effect cars at the start of 2022. Since the early 1980s, F1 cars have generated aerodynamic grip, or downforce, via front and rear wings. But drivers found it increasingly difficult to follow each other closely through corners as the dirty air from the car in front starved the following car's front wing of air, robbing it of cornering grip in the process.

The 2022 rules changed this, requiring cars to use a sculpted floor that generates downforce via the venturi effect. This reduced the importance of the front wing, and indeed, the cars were able to race closely in 2022. In two years' time, F1 cars will use less complicated floors with smaller venturis that generate a smaller ground effect, which the FIA says should mean no more having to run "ultra-stiff and low setups" to avoid the problem of porpoising.

Overall downforce is being reduced by 30 percent, but there's an even greater reduction in drag—55 percent is the target, which is being done in part to accommodate the new hybrid powertrain.

More hybrid power

The V6 internal combustion engine is becoming less powerful, dropping to an output of 536 hp (400 kW), but the electric motor that also drives the rear wheels will now generate 470 hp (350 kW). That leaves the combined power output roughly where it is today, but only when the battery has enough charge. However, cars will be allowed to harvest twice as much energy (8.5 MJ) per lap under braking as now.

And as Ars has covered in the past, the engines will run on drop-in sustainable fuels. The new engine regulations have succeeded in tempting Honda back into the sport, as well as bringing in Ford and Audi, and possibly Cadillac in time.

Since the cars will be less powerful when they're just running on internal combustion, more than halving the amount of drag they experience means they shouldn't be too slow along the straights.

When F1 first introduced its original hybrid, called KERS (for kinetic energy recovery system), the electric motor boost was something the driver could use on demand. But that changed when the current powertrain rules came into effect in 2014, and it became up to the car to decide when to deploy energy from the battery to supplement the V6 motor.

In 2026, that changes again. The hybrid system is programmed to use less of the electric motor's power as speeds pass 180 mph (270 km/h), down to zero at 220 mph (355 km/h), relying just on the V6 by then. But if a car is following within a second, the chasing driver can override that cutoff, allowing the full 470 hp from the electric motor at speeds of up to 209 mph (337 km/h), with up to half a MJ of extra energy.