I think it's a case where the checklists (which used actual flight manuals and info from pilots) in this case is more correct than the game, in that if you stay at a sustained 27 or so then the engine will fail more often than not. The Hurricane engine is a real baby in the game
hence nursing it with lower revs than perhaps needed in real life. The amount of constant boost and oil temp seems to be slightly off in the game.
The Rotol (Rolls-Royce / Bristol propeller) variant is a later and more advanced model than the Mk1, which only has the fine/coarse and an older wooden propeller.
I personally adjust pitch much more than throttle in the Hurricane, although in a dive I would throttle back as well.
Edit: An expert might be along in a minute, I more just bumble my way through the sim.
Edit2: Also, the checklist figures seem to assume an 100 Oct fuel, while I believe the sim makes the assumption the during that period of 1940 the less ummphy 80/87? octane was only available.