Carlos Tavares is an unashamed petrolhead, with a rally-racing hobby that harks back to an earlier automotive age. Yet carmakers like Stellantis, which he leads, and its rivals have had to set aside affection for roaring internal combustion engines as environmental rules set the limits for the industry. Stellantis was formed in January in a €50bn (£43bn) merger between France’s Peugeot and Italian-American Fiat Chrysler, in one of the clearest...