So far, Mazda has only unveiled the Japanese version of the Miata, hence the steering wheel being on the right side in this image. It also hasn't revealed any details about the Miata's engine and transmission.
Ever since its introduction, the Miata, although hardly slow, has relied on small four-cylinder engines, emphasizing feel and balance over sheer power. Mazda uses the Japanese term "Jinba-ittai" -- or "horse and rider as one" -- to describe the driving experience.