On a crisp day in Valencia, Spain, early last month, a small man in a cardinal-red jumpsuit walked a few steps from a million-dollar motor home and ducked into a lavish hospitality tent, both in the same bright scarlet. No one was allowed anywhere near him, but throngs of Spaniards hanging over the railing of Valencia's Ricardo Tormo racetrack went crazy. "Look up here, Fernando! Te quiero, Fernando!"
It was the first appearance of Fernando Alonso, a Spaniard and former world champion, as a driver for Ferrari's Formula One racing team. Whenever he briefly poked his head out,...