Harder, better, faster and, er, more expensive, the Competition Pack cranks the BMW M4 up to 11. For an extra £3,000, the M4 ...

Compare the opulent Mercedes-AMG S 63 E Performance and the lightweight BMW M4 CSL in this thrilling head-to-head.

But the convertible and four-door Gran Coupe variants live on, at least for now.

For the third year in a row, a fully electric M Performance model was the BMW M division's best-selling vehicle worldwide ...