388 WHP on a dyno jet and 42 WHP over the 2020 model.

https://www.caranddriver.com/reviews...a-dyno-tested/

 

Not too shabby

 

I'm definitely interested in one of these. I understand that the Z4 is not the same and the future is uncertain, but I think waiting 4-5 years is worth a shot ! Even if they are in the 30's. Or we shall see if the 2020 drops in value like a rock and swap cylinder heads !

​​​​​​https://usedfirst.com/cars/bmw/z4/

 

or you can just get a tune and gain more than 42hp...

 

Toyota screwed over current Supra owners.

 

Yeah I hate it when manufacturers improve their cars.

We should be applauding auto makers for improving their cars year over year, not getting upset about it. If you really want the extra power you can just get a tune anyway.