They would eventually run out of Hp to improve . There are limits even to an NA engine . Besides as it is 2.6 to 60 and 10 sec 1/4 is darn quick for a street car (2021 911 Turbo S) .True, but bigger block with boost will be more powerful than a smaller engine with boost. The 917 had twin turbos. Why would anyone want a small engine twin turbo when you could have a 1500 HP 5L flat 12? and that was 50 years ago. Imagine would they could build if the EU regulators allowed them to.
Besides ... the magic with the new Macan is in the PDK . Its way improved !!!
Somewhere on this thread I did post an old article which stated that Porsche could have opted for 500 Hp on the 3.6 Turbo. They didn't go there . Maybe too hard to offer 4 yr 50K .. who knows . They chose not to.
Either way my discussion centered on stock cars .. primarily the Base car where the buyer is not all that interested in winning races .. he just wants to have some versatility and fun. He also doesn't want to live in the shop with repairs.
Thats what we are seeing here lately show up.. guys who want a fun car to drive and are worried that at 50K they may go in and hit issues . The answer is right in front of them ..... "It;'s all about the Base"