Engine Sound - Sounds different ingame

ok, I guess I've been relatively lucky with sounds in ArmA before, as this is a new one for me, but I've added a engine sound to my land rovers and then gone ingame to behold the wonderous glory that is my custom sound, to discover that it sounds almost worse than BIS tractor sound (that strange, electronic/robotic putt putt sound)

Original sound:

http://www.pukf.net/Messiah/engine.wav

And ingame video of sound

http://www.pukf.net/Messiah/engine.wmv

(I'd upped the pitch by 50% in that video (config) to try and resolve the weird sound, obviously didn't work)

I've tried all sorts, playing with the pitch, the db, the length of the loop, noise reduction, everything I can think of. Given the tractor sounds equally awful, is it just that ArmA can't handle noisy diesel engines?

Well it is quite hard to make decent engine sounds for arma.And you should get recording of higher rpm,possibly add some bass and hope the best.

I'll have to wait till I'm back in the UK and can record my 110 then, otherwise this has to do.