Ingrid Steffensen’s bright yellow Lotus Elise is a little fancier and a lot faster than the Volkswagen Beetle she drove when she first got behind the wheel of a car as a 16-year-old, but both cars are an integral part of Steffensen’s “auto biography.” With the Lotus parked on the bricks outside the Roselle Center for the Arts, Steffensen chronicled her journey from college professor to “speed freak” as part of the President’s Leadership Series at the University of Delaware.