But that rock-crawling Cayenne proved hugely popular, so Porsche has taken what in some ways is an even bolder step: the new-for-2010 Panamera four-door hatchback sedan. Crazy? Illogical?

The Porsche Panamera was the sports car builder's first production four-door sedan when it debuted in 2009. This current, second-gen car was introduced for the 2017 model year, this time with an ...