Porsche 912
In 1965 after the end of Porsche 356 production, the brand-new 912 was released. It was a 911 but with a 2.0-liter, flat four-cylinder engine, 90 hp, and modest performance. The car was also significantly cheaper than the 911 and very fuel efficient with 36 mpg (via Porsche).
Despite its slow performance, the 912 turned out to be a major hit for the factory. Between 1969 and 1969, more than 32,000 examples left showroom floors. In fact, the 912 proved to be a savior of the whole 911 series because it secured the financial stability of the factory until buyers fully accepted the 911.