In 1990, Aston Martin ended production of its Lagonda luxury sedan, largely remembered by auto critics as one of the ugliest and worst cars of the last 50 years. With a mere 645 examples, the Lagonda nameplate appeared to be gone for good. However, during its 16-year production run—and the subsequent years thereafter—the car developed a cultlike following among those with a very distinct taste for luxury goods and a particular penchant for four-door saloons. Recognizing this demand, Aston Martin recently annou…