Unconstrained by the limitations of budget and the realities of manufacturing, concept cars afford talented designers the opportunity to explore their wildest and most progressive ideas. At their best, these dazzling, artistic creations invite us to totally reimagine what the automobile can be.

As in the world of fashion, however, car design evolves quickly; it is unusual to find a concept that remains relevant after its allotted time in the spotlight comes to an end, let alone one that is still compelling over six decades after its debut. Rarer still is the concept that transcends its role as a design exercise to embody the sculptural potential of the automotive form. And when it comes to a trilogy of concepts that effortlessly achieves both feats, there is but one spectacular example: The Alfa Romeo Berlina Aerodinamica Tecnica series by Franco Scaglione.
Whether considered the ultimate three-movement concerto of automobile design or the only true automotive triptych ever produced, few will contest the greatness of the B.A.T. 5, 7, and 9d concepts. Hand-built by the storied Carrozzeria Bertone of Turin, Italy and introduced in 1953, 1954, and 1955, respectively, these cars were pioneering in their use of aerodynamics. With flamboyant aesthetics that simultaneously minimized drag for optimal performance, the B.A.T. cars were immediately and enthusiastically embraced by press and public alike.

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Individually, each of the B.A.T.s is, witho...