They're nearly identical, and roll off the same assembly line, but Mini manages something unique that BMW doesn't.

Our test M4 Competition convertible blasted to 60 mph in 3.2 seconds before crossing the quarter mile in 11.3 seconds with a trap speed of 122.8 mph.

Will Neue Klasse change that? Styling aside, BMW’s next-generation sedan will be packed with new technology. That includes ...