Whereas almost every car sold in the US struggled with serious performance drops as a result of tightening emission controls during the 1970s, there was one powerful exception: the Porsche 911. Well, yes, there were some impacts, but I can’t think of another car that mostly kept performance intact, and began to improve performance again so quickly and steadily. The secret: keep making the engines bigger! Well, that wasn’t a good option for American cars with their already-too large engines, but it worked like a charm for the 911.
– December 8, 2016