F1 2026 regulations explained: power units, active aero, and smaller cars

The biggest reset in a generation

The 2026 regulations change the Formula 1 car at every level at once: a new power unit, a new aerodynamic philosophy, a smaller and lighter chassis, and new tyres. The FIA has framed the package around more agile cars, closer racing, and a fully sustainable hybrid engine, and it was written partly to attract new manufacturers to the grid^[1]. This is the guide to what actually changed and why it matters for the racing.

New power units: half electric, fully sustainable

The headline change is under the bodywork. The 2026 power unit keeps the 1.6-litre V6 turbo-hybrid layout but rebalances it dramatically toward electric power. Output is split roughly evenly between the internal combustion engine and the electric motor, with the electrical contribution rising from around 120kW to 350kW, close to a threefold increase^[3].

To make that possible, the MGU-H (the heat-energy recovery unit attached to the turbo) is removed entirely, simplifying the hybrid system and cutting cost, while the MGU-K that harvests and deploys energy under braking and acceleration is enlarged^[3]. The engines also run on 100% advanced sustainable fuel, a central plank of the sport's stated path to net-zero^[1].

Active aerodynamics replace DRS

For the first time, both the front and rear wings move. Drivers run a high-downforce configuration through corners, with the wing flaps closed, then switch to a low-drag configuration on the straights, with the flaps opened to flatten the wings and raise top speed^[4]. The FIA's technical shorthand calls these the Z-mode (downforce) and X-mode (low drag) settings^[4].

This active aero does the job DRS used to do, cutting drag where it helps most, but it applies to every car all the time rather than only to a chaser inside one second. The fixed-zone, follow-the-leader DRS system is retired for 2026^[2].

Overtaking gets an electric boost

With DRS gone, overtaking gets a new tool tied to the power unit. A driver running within about a second of the car ahead is allowed extra electrical energy deployment, an Override-style boost that delivers a burst of additional power to help complete a pass^[6]. The intent is the same as DRS, a temporary advantage for the chasing car, but the mechanism is now battery deployment rather than a stalled rear wing^[6].

Smaller, lighter, more agile cars

The 2026 car is physically smaller. The wheelbase is cut by 200mm to a maximum of 3400mm, the bodywork is 100mm narrower at 1900mm, and the floor is narrowed, all to make the car nimbler and easier to follow^[2]. Minimum weight drops by 30kg, reversing years of the cars getting heavier^[5].

The tyres shrink too. The 18-inch wheels stay, but the front tyres are 25mm narrower and the rears 30mm narrower, trimming both drag and weight^[5]. Less overall downforce and less drag is the deliberate trade: cars that are quicker in a straight line relative to their cornering grip, which should make slipstreaming and overtaking more viable^[2].

What it means for the racing

:::analysis The 2026 reset is as much about energy management as lap time. With so much performance coming from a 350kW battery that has to be harvested and redeployed every lap, drivers and strategists will be managing electrical deployment the way they currently manage tyres. Expect "lift and coast" and energy-saving to become a visible part of wheel-to-wheel racing, and expect the cars that recover energy most efficiently on a given circuit to have an advantage that is not obvious from raw engine power.

The active-aero and Override package is an attempt to fix the dirty-air problem that has made following and overtaking so hard. Whether it produces closer racing or simply a different kind of straight-line game will take a few races to judge, and the early-season pecking order will likely be set as much by who got the power unit right as by chassis design. :::

A new-look grid

The rules were also designed to bring in fresh manufacturers, and the grid grows for 2026 to reflect that^[1]. New and renamed constructors join the established teams; see the current lineup on the teams page and how each driver stacks up on the drivers page.

Where to go next

• How races are won and lost: what are the strategies in F1?
• The tyre side of the rules: F1 tyre compounds explained
• Concept-by-concept depth: glossary
• This season's racing, weekend by weekend: latest news