Hyundai has introduced more four-cylinder versions of its midsize Sonata sedan in response to concern about high gas prices. For 2008, all Hyundai Sonata models, not just the base version, are available with an economical four-cylinder engine that rates an EPA-estimated 30 mpg Highway.The Hyundai Sonata is a four-door, five passenger sedan priced at the low end of the mid-size market, where it competes primarily against the Honda Accord, Toyota Camry, Nissan Altima, Chevrolet Malibu, Kia Optima, and Ford Fusion... read more