The N63 might not be the most reliable engine ... to the X3 M/X4 M in the Competition package. The S68 V8 is a recent addition to BMW's engine lineup. It is offered in range-topping cars like ...

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 ...