Video says 3x1800 hp Packard turbocharged V-12’s.
Must be updated. My dad was a PT driver.
If they are Packards they are the Rolls Royce V12 we put in the P-51 Mustang. About 1,700HP for aircraft use I think. British engine licensed to American manufacturer. Originally used on Spitfire.
Used to have all this crap memorized like some baseball freaks but have forgotten alot.