This is a Civic, not a luxury sedan. Even though it has more sound deadening in the dash than the Civic EX, it's not a place for quiet contemplation. You hear the engine loud and clear, and plenty of road rumble gets through as well. This is due in large part to the meaty low-profile summer tire package. However, the slippery shape avoids most wind noise. The noise levels are part of the trade off between the Si – especially with summer tires – and the Civic EX.