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Why Leclerc Isn't Using Latest Ferrari ADUO2 Engine in the Spanish GP

Ferrari is holding back the upgraded ADUO2 unit after Leclerc’s Monza crash, leaving him with older-spec power compared with Lewis Hamilton.

  • Ferrari driver Charles Leclerc is using an older-spec ADUO1 power unit for the Spanish Grand Prix, opting against the new ADUO2 engine following concerns over potential damage from his heavy crash at the Italian Grand Prix.
  • Leclerc lost control at the high-speed Parabolica at Monza, striking the barriers on the second lap. While external structural checks found no cracks, Ferrari engineers deemed the engine too risky to use without thorough X-ray examinations.
  • Despite the power deficit, Leclerc outpaced teammate Lewis Hamilton, who is utilizing the new ADUO2 engine, in Friday's opening practice session, setting the third-fastest time behind the Mercedes pair.
  • The 22-turn Madrid circuit may mitigate the engine handicap, as the track prioritizes aerodynamic downforce and traction over raw power, unlike the high-speed demands of Monza where engine performance is critical.
  • Engineers postponed returning the engine under observation until opening practice in Baku to avoid compromising preparation for Madrid, where small issues during Friday practice could have risked finalizing the weekend setup.
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Ferrari team manager Fred Vasseur spoke after the training day about the performance of Ferrari and what matters for a successful weekend. And how the stand is with the Leclerc engine.

Formula 1 - Ferrari was forced to return to an old specification of its powertrain in Charles Leclerc's SF-26 for the Grand Prix (...)...

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autoracer.it broke the news on Thursday, September 10, 2026.
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