“Have you compared actual figures rather than the standard pilot forum reports from people who have never opened up the POHs?”
Well – I have owned an AA5B and a DR400. I investigated a TB10 but discounted it as slow and expensive (prop) at the time (I did fly it). My memory was 127 ish kn, which is similar to the AA5B and much slower than the DR400 (at same fuel burn).
“Physics is physics, as they say...”
As the three aircraft have the same engine but radically different construction I think this is not relevant.
Rod1