For 2008, the Mazda MX-5 Miata adds a 6-disc CD changer, seat lifter and a tire pressure monitoring system. The heart of the MX-5 remains a highly-responsive 2.0-liter, 166 horsepower 4-cylinder. The non-powered fabric convertible top opens or closes easily with a one-handed effort from the driver’s seat. The new power retractable hard top (PRHT) model enhances year-round comfort and security with a metal hard top that opens or closes in 12 seconds at the touch of a button.