McLaren CEO Zak Brown does not think louder engines would scare away sponsors in Formula 1 as long as they were sustainable.

With new power-unit regulations being introduced in 2025, calls are growing for the next generation of engines to be made louder again.

However, there are concerns that doing so would be a step back in the quest to make F1 more environmentally friendly, which Toto Wolff feels would deter commercial partners.

Red Bull team boss Christian Horner thinks the sport can keep things sustainable while improving the sound though, and Brown feels as long as that is the case, sponsors will not go anywhere.

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