Which mark of the Tempest? There were 2 different versions which sounded completely different. The Mk II had an 18-cylinder turbo-supercharged Bristol Centaurus radial. like the later Sea Fury & the Mk V (actually the first in service) was fitted with a Napier Sabre 24-cylinder liquid-cooled inline engine. I've not heard a Sabre running but it would have had a sound all of its own. I've seen a sound package for it but have no idea if it's authentic. Look for a Typhoon/Tempest package by P Burnage.