Collectible scale model of Porsche. Model scale 1/18. The model is released in a limited edition of 504 pieces. The manufacturer of the scale model is Minichamps. Approximate size of 1/18 scale car model is about 22-28 cm long for a passenger car. For trucks, buses, motorcycles, and other vehicles, the exact dimensions of the model can be obtained by dividing the dimensions of the prototype by the scale.