The S63 and the N63 are 4.4-liter V8 engines made by BMW and installed into its vehicles. While these two V8 engines have several similarities, they also have significant differences. Let's start with ...

Car enthusiasts of a certain age may feel particularly dated by the following fact: the first two powerplants to mark BMW's mass-market adoption of twin-turbo engines are about to start turning 20.

BMW, like many other automotive companies, has a wide array of its own in-house engines. One of these is the N63, an engine that has been in use since 2008 and still makes its way into new models ...