It's hard to judge from a recording about loud engines.
Shackelton- yes, the Texan has a pretty loud engine. Pratt & Whitney, I think. I heard one ( a Harvard) up here in Ottawa last summer - my mother was there too and she said she remembers well all the Harvards going over Ottawa during the war. (British Commonwelath Air Training Plan) BTW - You can see shots of Ottawa in 1941 in Captains of the Clouds - amazing show of Ansons, Tiger moths, Stearman's, Hudsons, and bushplanes, even a Hurricane disguised as a Messerschmidt, and of course Jimmy Cagney - if you haven't seen it - do so - the plot is OK, but it's the technicolor photography of the vintage aircraft that is the real attraction.
I think any 160 HP engine without muffling would be pretty loud.
Cheers,