[Test Pilot]

I mean I'm going to get stuck on that point a fair bit here. Are we in agreement the 605AS is precisely and no more than a 605A-1 with a 603 supercharger fitted?
I can look up the documentation.

Yes, a 605AS is a 605a-1 with the same DB603 supercharger as the DB605D, but so is the 605ASM/B/C. If the ASB and ASC were 605D variants, I'm sure they would have been designated as such. Even from a mechanical perspective, it is incorrect to refer to them as 605D's because the base D-series had structural and detail changes that the AS-series did not. The 605AS-series engines were a stop gap to lend the 605A greater altitude performance until the DB605D was ready for production.

Edit: BTW, I just reached 725 kph in the Bf 109G-14/AS at 6500M! hock: 8)

So we have new king of speed in 109 family

I really start to like new bf's even more.