LOS ANGELES — Lamborghini introduced the retro Miura concept, which hews closely to the celebrated 1966 original version, on Thursday at the Los Angeles auto show. In a statement, Automobili Lamborghini said the new concept is "strictly a concept, with no firm date set for its production launch." However, Lamborghini CEO Stephan Winkelmann recently told Car magazine: "We are not yet talking about production. But every project has its meaning." The Miura concept is a landmark vehicle and the first Lamborghini to be designed by Walter de'Silva, head of design at the Audi Group. The company said de'Silva aimed at...