[Flying Ace]

I heard the coupe was slightly quieter than the Gran Coupe and convertible due to a smaller area of the window frame and roof to seal noise from.

Check out Car and Driver magazine or Motor Trend's spec sheets where they measure interior decibels at certain speeds. You can then compare it against your other cars.

You can also remove the ASD to quiet down the cabin even more. That said, this car is not designed to completely seal you away from the mechanical noises of the car. IMO, also tire noises often comes down to the tires used.