Someone who bought a rare Bugatti, Jaguar or Ferrari in top condition would have done better during the downturn than an investor in almost any other asset, industry observers say, including stocks, fine art or even gold. “There has been a flight into real assets,” says Historic Automobile Group founder Dietrich Hatlapa, a former Baring Securities and ING banker and collector who designed the HAGI Top, a new index that tracks the prices of a cross-section of historic cars. “People want something they can look at and touch in the evening, rather than a piece of paper in the...