Actually, what you are looking at in terms of "reworked"
is a strengthened aluminium block with a heavily modified cylinder head , The Induction tech is completely all new as will be BMW's latest bi-vanos variable valve timing.
EfficientDynamics plays a huge part in not only lightweight chassis and body panel technology. Engine Stop-Start , on-demand ancillaries operation and Brake Energy regeneration will give the all-new M3 20-25% better efficiency than the current V8.
The First protypes of the BMW M4 Coupe will be seen later this summer.