sentences:  The Alfa Romeo Aerodinamica Spyder was an one-off mid-engine streamlined prototype, built by brothers Gino and Oscar Jankovitz in connection with Alfa Romeo between 1935 and 1937 in Fiume (today Rijeka), and should have been powered by an Alfa Romeo 12-cylinder engine.The construction of the car took many years, while technical changes had to be made due to the testing period from 1936 to 1937.The Aerospyder represents