It replaced the 1.3L in 1957 and became the standard engine size for later iterations of the 356 model range. A Super variant would later follow.
Need for Speed: Porsche Unleashed
The 356 A 1600 appears in Need for Speed: Porsche Unleashed as a Class 3 vehicle in the Classic Era category and is an improvement of the 356 that.
Having more power than the previous iterations, makes it competitive with the higher end 356 models.