Aside from the short-lived turbocharged MazdaSpeed MX-5 Miata, the little convertible has always been a bit lacking in the power department, and it caused enthusiasts to shoehorn all sorts of motors ...
The skunkworks project was put together by a team of Mazda engineers working after hours, but it failed to make it to production. Mazda engineers secretly built a V6 Miata prototype two decades ago.