Miata engines are upgraded, but it will change fuel economy
 

Mazda is upgrading the Miata's engine for 2019. Here's how the 2019 Mazda Miata engine changes impact fuel economy.

"The Miata is already a quick roadster. As far as we can tell, it is the fastest convertible at its price point. With a 0-60 MPH time under 6 seconds, it will only be faster given these new changes. A 14% power bump is nothing to sneeze at," writes John Goreham of Torque News.