2015 Mazda MX-5 Miata Engine & Mechanical MAZDA MX-5 MIATA AT A GLANCE ENGINE TY PE 167-hp , MZR 2.0L DOHC 16-valve 4-cylinder engine with variable valve timing (VVT) CONV ER TIB L E OPTIONS Choice of soft top or Power Retractable Hard Top (PRHT) EPA-ESTIMATED FUEL EFFICIENCY * 22/28 city/hwy — 5-speed MT * 21/28 city/hwy — 6-speed MT Regardless of trim choice, the only engine option offered on the Mazda MX-5 Miata is the 2.0-liter Skyactiv 4-cylinder engine. you can get the RF hardtop model for a total of $38,550. The high 5b4jovl.