I agree with you Freak!
I just done some number crunching. I hope I've got this right...
200HP out of an A15 bored to 79mm requires something like:
1) BMEP = 200psi at 8100 rpm
2) BMEP = 210psi at 7700 rpm
strength issues aside, these BMEP's are definately possible but to get them at those rpms will require some serious porting and compression.
I'm still a believer!!!