I think it depends on the engine spec? As far as I know my 245 VZ1 does not have the fake or enhanced engine noise, but the 300s do? 300 owners on here would be able to supply further info
 
All Cupras and golf gti,R have a certain amount of fake noise pumped through the speakers. However, on the cupra leon 300 it sounds pretty good. Only on the inside tho xd
 
If you have it then you should tell me I guess :D
But yes, the 245 hybrid does fake the engine noise through the speakers. I hope you didn't think that this 1.4 engine would make such a deep sound naturally.