Massive amounts of variables there tbh, because most trailed harvesters are farmer owned they usually only have the biggest tractor on farm on the job, rather than a tractor to make output like a contractor machine.
have a mengele sh40n here on a 150hp new holland. clear 50 to 60 acres of light ish crop rowed into 20ft swaths, that's with changing trailers not side loading, and the machine is never pushed hard. unsure on fuel use, but needs a good fill end of the day!
the same machine on a 250hp tractor, with the gearing set accordingly on the machine would push 80-90 ac??? in god going?? not sure mind!
thinking of buying?