Concerned that the considerable price increase of a 911 over the 356 would cost the company sales and narrow the appeal of the brand, a decision was made by executives to introduce a new four-cylinder entry-level model. In 1964, a year both the 356 and the 911 were in production, Porsche engineers constructed a 912 prototype. Images (13).jpg|a red porsche 912 with black stripes images (14).jpg|porsche 912 in blue images (15).jpg|the front of a porsche 912