Introduced for 2010, the Porsche Panamera horrified purists but lured buyers all over the world. It was Porsche's first-ever four-door sedan, built in part for the burgeoning Chinese market, and its humpbacked styling is ... well, let's just say ... polarizing. Now Porsche has unveiled the most fuel-efficient Panamera yet, a clean diesel version that achieves a remarkable 37.3 mpg on the European cycle when fitted with low-rolling-resistance tires (and about 36 mpg without them). It also comes with a standard start-stop function, to switch off the engine while the car is stopped. (Note that...
Porsche 911 Hybrid Test Car Uses Flywheel To Store Energy
Pretty much every manufacturer is now at least experimenting with hybrid cars. The bulk of them use a high-voltage battery pack to store and deliver energy to supplement a gasoline engine. But in its experimental 911 GT3 R Hybrid test car, Porsche has taken a different tack toward energy...John Voelcker