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 has a history of building brilliantly designed and built performance engines. Judging by this latest I Do Cars teardown video, the 4.0-liter twin-turbo V8, internal designation N63, is not one of ...