The Porsche 911 (pronounced Nine Eleven or in German: Neunelfer) is a two-door, 2+2 high performance rear-engined sports car. Introduced in September 1964 by Porsche AG of Stuttgart, Germany.
The engines were air-cooled until the introduction of the Type 996 in 1998, with the 993, produced from 1994–1998 model years, being the last of the air-cooled Porsche sports cars.
The Porsche 996 is the internal designation for the 911 model manufactured from 1997 to 2006. The 996 had little in common with its predecessor, with the first all new chassis platform since the original 911 and a new water-cooled engine. Technically, it was a major change, a complete breakthrough from the original car other than the overall layout.
Progressively stringent emissions and noise regulations, environmental concerns, a higher expectation for refinement and the need for a high-performance 4 valve per cylinder engine made the switch necessary. Other major changes include a completely new platform having a sleeker body with a more raked windshield, and a re-designed interior along with new "fried egg" shaped headlamps (so called due to the amber coloured turn signals) instead of previous "bug eye" headlamps.