2011 Hyundai Sonata GLS: Quiet on the inside; noisy under the hood
July 30, 2010
One of the reasons our 2011 Hyundai Sonata GLS makes 198-hp and is currently earning over 25 mpg with just a 2.4-liter 4-cylider engine is because it uses high-pressure gasoline direct-injection (GDi in Hyundai parlance). While it is just teeny bit louder at idle on the inside than either the comparable Honda Accord or Mazda6 4-cylinder models (here's the comparison), it makes quite a racket on the outside. Have a listen for yourself.
Chris Walton, Chief Road Test Editor @ 2992 miles