23. Porsche 912
Worried that the costly 911 would narrow its customer base and affect sales, Porsche needed an entry-level model for people who wanted an everyday sports car that would be dependable as well as economical. Nobody considered the economy of performance models in those days, but Porsche realized it could be a good selling point.
So in 1965 just after the end of the Porsche 356 production, they released the new 912. It was a 911 but with a 2.0-liter, flat four-cylinder engine producing 90 HP and modest performance numbers. The car also costs significantly less than the 911 and was fuel-efficient at 36 mpg. If you thought all Porsches are fast, well, not all actually are (via Porsche).