DEARBORN, Mich. - Soon after Jim Farley became Ford Motor Co.'s marketing chief after a 17-year career at Toyota, he took a spin in a subcompact with Ford's new direct-injection, turbocharged engine. "I couldn't wipe the smile off my face," Farley said. "I've never driven a Toyota like that, ever. The torque, out of that kind of displacement — in this case a 4-cylinder — was shocking." It's a good thing he feels that way, because one of Farley's first and most critical assignments as vice president of global marketing will be to sell Ford's engine — dubbed EcoBoost —...