how fast is it?

[Tomaz]

The valvetronic replaces the throttle body for limiting engine speed. Though the valvetronic is more technically advanced than a throttle body, it is less responsive to rapid changes like flooring it off the line. Once at speed the valvetronic breathes better than a throttle body and adds horsepower. I doubt you will see valvetronic M engines.

[DINANM3]

Originally Posted by Tomaz

The valvetronic replaces the throttle body for limiting engine speed. Though the valvetronic is more technically advanced than a throttle body, it is less responsive to rapid changes like flooring it off the line. Once at speed the valvetronic breathes better than a throttle body and adds horsepower. I doubt you will see valvetronic M engines.

I agree and Bmw has already said there Mcars will never have valvetronic