I have a Alfa Romeo 166 which has developed a noise that sounds like a spinning top sort of hum/wine, It tends to get louder when turning a tight left hand bend and the noise is constant even when coasting with the gearbox in neautral and the clutch depressed.Could it be a wheel bearing?

Optional Information:
1999 alfa 166 2,5v6 24 valve

Already Tried:
nothing yet