Hrmm noises! We've done 850 miles in our 1.6 now and here's my findings...
Stationary with the engine running the car is near silent from the inside, I've had to double check the tach to see if the car is running a number of times
Around town & slow driving there's little road noise, can quite easily hold conversation with someone in the back. There's a whine from the gearbox at the top of 1st & into 2nd. Reminds me of my old MINI Cooper-S's supercharger but its nowhere near as loud.
Motorway driving (i.e.70-80mph) there is a bit of wind noise, I'd say about the same as our Mazda 2. However in the rain you can hear the water splashing up in the rear arches, I assume the sound deadening in the boot isn't that good. Also the engine revs are quiet high at 70mph, some 4,000rpm, but its not a very noisey engine.