Despite looking outwardly similar to the preceding models, Porsche thoroughly updated their 356 line in 1956 and called their new model the 356A. At the core, this included a larger 1600 cc engine, but also a curved-glass windshield and a thoroughly revised suspension. At the 1955 Frankfurt Motor Show in September of 1955, Porsche released the 356A/1600 to the world with cabriolet, coupe and speedster bodies from Reutter. Produced in 1959 only, the Porsche 356 Convertible D was the replacement for the 356 A Speedster, which was discontinued after 1958.