Porsche 911 by Vauxford - CC BY Porsche’s two-door 911 sports car has been in production since 1963 and garnered numerous awards over the years. The vehicle has received particular praise for its air-cooled opposed rear-engine design (water-cooled since 1998) and independent suspension. Having been manufactured for over 50 years means that there’s a great number of used Porsche 911 year models to choose from. Luckily, CoPilot is here to help you choose the best option!