F1MATHS: Mercedes flexes its power advantage as Suzuka exposes Ferrari’s energy limitations

The second free practice session for the 2026 Japanese Grand Prix delivered one of those rare telemetry comparisons that instantly clarifies the competitive landscape. F1Technical's senior writer Balazs Szabo delivers his latest analysis.

With Charles Leclerc, Andrea Kimi Antonelli and Oscar Piastri all completing representative soft‑tyre laps, the overlay of their fastest attempts painted a strikingly consistent picture: Mercedes holds a meaningful power‑unit advantage at Suzuka, McLaren is extracting the same hardware in a subtly different way, and Ferrari is paying a heavy price in the most power‑sensitive parts of the lap.

The headline times already hinted at the story. Piastri’s 1:30.133 stood as the benchmark, Antonelli trailed by just 0.092 seconds, and Leclerc was a further six‑tenths back.

But the deeper truth emerged in the speed trace and delta plots. Suzuka is a circuit that rewards efficiency, deployment discipline and top‑end power — and the Mercedes unit, in both the works car and the McLaren, showed its muscle.

Ferrari’s deficit was most visible on the straights. Down the start‑finish stretch, Leclerc’s trace sagged relative to both Antonelli and Piastri, the delta climbing steadily before Turn 1.

The same pattern repeated between the exit of Turn 14 and the hairpin: a long, sustained acceleration zone where Ferrari simply could not match the electrical energy output of its rivals. The SF-26’s internal combustion engine performance is competitive, but the hybrid system’s deployment window remains its Achilles’ heel.

By the time Leclerc reached the braking zone for the hairpin, the delta had ballooned again — not because of cornering weakness, but because the car had run out out of electrical energy.

What made the comparison between McLaren and Mercedes particularly fascinating was not raw power but philosophy. Both teams run the same Mercedes power unit, yet their deployment maps diverged in intent. McLaren used a more aggressive burst of electrical energy down the start‑finish straight, front‑loading their lap with a strong initial punch.

Mercedes, by contrast, held more in reserve, unleashing a larger portion of their deployment down the back straight and into the final chicane. The result was two different shapes to the speed trace: McLaren peaking earlier, Mercedes surging later.

This difference also explained the subtle ebb and flow in the delta between Antonelli and Piastri. Through the Esses and the technical middle sector, the two cars were closely matched, but as the lap unfolded, Mercedes’ late‑lap deployment strategy allowed Antonelli to claw back time.

Ferrari, meanwhile, showed competitive cornering performance — especially in the first sector, where Leclerc’s confidence in the high‑speed changes of direction kept him in touch. But every time the lap opened into a long acceleration zone, the red trace faded.

The broader implication is that Suzuka, with its blend of sweeping corners and punishing straights, has become a litmus test for hybrid efficiency. Mercedes’ power unit appears to have taken a decisive step in 2026, not only in peak output but in how effectively teams can shape its deployment.

McLaren’s early‑lap punch and Mercedes’ late‑lap surge are two expressions of the same underlying strength — and both are currently out of Ferrari’s reach.