Elon Musk erred by devoting too little of his time to Tesla Inc., which is overvalued and being humbled by China’s top electric-car maker, according to Stellantis NV’s outspoken former chief executive officer.

Carlos Tavares, who was ousted from the manufacturer of Peugeot, Fiat and Jeep late last year, told the French newspaper Les Echos that BYD Co. is more efficient and cost-competitive than Tesla. He predicted Musk will opt to prioritize other pursuits.

“We can’t rule out that at some point, he’ll decide to leave the automotive industry to refocus on humanoid robots, SpaceX or artificial intelligence,” Tavares said in an interview promoting his just-published memoir. “Elon Musk will have left the automotive industry.”

Musk’s level of involvement at Tesla and the direction he’s taken

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