If it would be the same engine but with more drag and weight, the speed curve would be nearly identical, with peaks at the same alts. Of course the heavyer-draggíer aircraft would be a little bit slower, just as on the 109G2-G6, or the Spitfire8-16.
The peaks on the A8's speed curve are at different altitudes than on the A5, also the A8 is slower than the A5 everywhere, except under 3-4K. Especially at higher altitude, the A5 is pretty good up to 23-24K while the A8 falls sharply back over 19K. Is the BMW 801D engine even turbocharged? (exuse me for my aknowledge...) If so, looks like the A8's one is geared towards the lower altitudes, but the A8 isnt faster at all... ergo, it seems, its engine is weaker.
Are the speed curves correct? If so, what was the logic behind decreasing the performance? The germans were focusing on the low-alt ground attack missions that much, so they sacrificed the high alt speed?
Please enlighten me, im curious.
Thanks,
Debrődy