Barcelona's data lays the groundwork: Pace profiles, mile gaps and tyre trends that will shape the second Bahrain test

 

The first test was about survival (does it run?). The second test (18-20 February) will be about synchronisation (does it win?). On the account of many teams having stoppages, nobody has completed a full 57 lap race simulation without “clipping” (running out of battery). Test two will be a “battery war” to see who can finish a race distance fastest. The fast times from Kimi Antonelli were set on softer tyres. In test two, the FIA will likely see teams move to the “harder” compounds to find the thermal degradation curve – the real indicator of who will win the first race in Australia. Teams like Williams and Haas, who found “good learning,” will now bring “version 1.5” parts to Bahrain – upgrades designed specifically based on the data they gathered just 48 hours ago.

The analytical contradiction where cars are faster than the simulators predicted is a warning sign. F1 teams live and die by “correlation.” If the real world is “better” than the virtual world, it sounds good but it actually means the engineers don’t understand why the car is fast. Without that understanding, they cannot develop the car throughout the year. The team that “solves” this math in Bahrain will dominate the first half of the season.

For the first time in decades, F1 cars are getting smaller. Shorter by 200mm making the car more “darty” in chicanes but physically less stable in high speed sweeps. Narrower by 100mm, since the floor generates most of the downforce, engineers are working with a significantly smaller “canvas” to find grip. A 30kg reduction that is a massive engineering headache given the heavier batteries.

This is the most volatile number in the sequence. In 2025, the electric motor (MGU-K) provided 120kW. In 2026, it nearly triples to 350kW (approx 470 hp). As a result of the total output stays around 1,000 hp, the Internal Combustion Engine (ICE) has been “detuned” from ~560kW down to 400kW. Nearly 50% of the car’s push is now digital. Testing is no longer just about engine reliability: it’s about energy management. If the software miscalculates the harvest rate, the car loses 470hp instantly on a straight – phenomenon known as “clipping.”

The 2026 regulations intentionally “break” the car’s aerodynamics to allow closer following. The removal of complex ground effect tunnels and a simpler floor cuts downforce by roughly 30%. To stay fast, teams use active aerodynamics (straight mode and corner mode). This creates a binary data set. Engineers are no longer for a “sweet spot”: they are looking for stability during the transition. If the front and rear wings don’t hit their targets at the exact same millisecond, the car’s balance shifts by 20% in an instant.

F1 has switched to sustainable 100% fuel and the FIA has changed how they measure it. Instead of just measuring weight, they now measure energy density. This creates a “chemical arms race.” Teams with fuels that have a higher energy density can carry less fuel weight to hit that 3,000 MJ limit. Testing is the first time we see which team’s “energy recipe” gives them a 20-30hp invisible advantage.

The most concerning data point of the test belongs to Aston Martin. Despite having Adrian Newey and a new works Honda engine, the AMR26 completed the lowest mileage (206 laps) in addition to a massive 4.5s off the pace. Reports suggest Newey’s packing is too aggressive. The car is suffering from “thermal stalling” – it’s so aerodynamically tight that the engine can’t breathe in the Bahrain heat. It’s a classic Newey gamble: if they can fix the cooling, the aero is a weapon: if they can’t, the season is over before it begins.

A surprising “data headache” from the first test was the complexity of race starts. Without the MGU-H, the turbo lag is massive. Drivers are struggling to get the car’s off the line without the engine “bogging down” as it waits for the electrical boost to kick in. Expect to see the final hour of every day dedicated to practice starts. Teams are desperately calibrating software to bridge the “turbo gap” before the lights go out in Australia.

The mileage charts from test one reveal a stark divide in preparation. Williams and McLaren tied for the “lap championship” with 422 laps each. For Williams, who skipped the Barcelona shake down, this was a massive relief – their simulation data finally correlates with the track. Aston Martin is in a “body blow” situation with only 206 laps completed. Their Newey designed chassis is reportedly struggling with cooling the new power unit (PU). Williams will finally “turn up” the engine to find performance, while Aston Martin is in a race against time to bring a “spec B” cooling package to test two. If they can’t fix the overheating in the Bahrain desert, they will be starting the season at the back of the grid.

By Charlie Gardner 

📸 Imagery courtesy Formula One