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 ...

This 650i’s replacement motor didn’t last long, and its internal damage tells a familiar story for early N63 owners. The BMW N63 V8 was initially praised but quickly became notorious for unreliability ...