 We set a decibel meter in the the cabin and at 70 mph the 93 db reading requires hearing protection by the federal government.  You get engine noise at low speed and tire noise along with wind noise at speeds higher than 45 mph.  The engine always seems to act as if it is working to keep up at the 55 - 65 mph  and the fuel mileage on two long trips of Interstate in excess of 300 miles has not been above 19.7 miles per gallon, currently only have 4100 miles on auto.   JBL radio speakers are poor and there is not a setting that will pair volume with increased sound so in town at 40 mph your radio volume is set at 12 for volume and on the highway at 70 mph you need to turn the radio up to a setting of 28.  This is my forth Toyota and it will be my last.