one test drive to appreciate the MX-5 Miata's purpose-built design. And the unique, ... that every key component in the MX-5 Miata was as strong and light as possible. ... 170-hp engine, hood, trunk lid and even rear brake calipers are all aluminum. And ... gram of fat to slow it down, the MX-5 Miata is nearly 400 pounds lighter than some ... ultralight flywheel improves the MX-5 Miata's responsiveness and enhances the engine' ... a high-compression ratio help the MX-5 Miata's new powerplant generate 20% more ... cylinder block and head ensure the MX-5 Miata's larger, more powerful 2.0-liter, 4- ... variable induction, enable the MX-5 Miata to maximize both low-end torque and ...