https://www.cnet.com/roadshow/news/next-gen-bmw-z4-prototype/

Specifically, BMW says this is the Z4 M40i, which will follow in the footsteps of other M40i models in terms of performance bits: The company says it has an inline-six engine (likely turbocharged and displacing 3.0 liters), a lowered adaptive suspension, upgraded M Sports brakes and an electrically-locking rear differential. All that will make the Z4 a "whole new benchmark in the roadster segment," the company claims.

BMW promises "a tangible increase in sporty flair" compared to the old Z4.