The fourth-generation Miata remains true to Mazda's original formula of a lightweight, rear-wheel-drive roadster. Although 155 hp from the 2.0-liter four doesn't sound impressive, the Miata quickly scoots along while returning a miserly 34 mpg overall. Shifting the delightfully accurate six-speed manual shifter is a joy; we'd skip the optional automatic, though it works fine. Quick and precise steering delivers sublime back-road handling, even though some body roll is noticeable. High levels of noise, thin and unsupportive seats, and a stiff ride all grow fatiguing during highway travel. Cabin space is snug, and the optional dial-controlled infotainment system takes time to master. Flipping the convertible top open or closed is a breeze. A retractable-roof RF coupe takes the place of the previous retractable hardtop roadster design; there is some annoying wind noise behind your head when the top is retracted. For 2019, horsepower jumps from 155 to 181. Changes for 2020 include suspension updates, and standard forward collision warning, low-speed automatic emergency braking, blind spot warning, rear cross traffic warning, and lane departure warning on all trim lines. Also, all 2020 models get standard Android Auto and Apple CarPlay compatibility.