It's been a long time coming, but a turbocharger finally returns to the Mazda 3. Just don't call it a Mazdaspeed 3. The 2021 Mazda 3 2.5 Turbo makes 250 horsepower and 320 pound-feet of torque from its 2.5-liter turbo-4 with 93 octane gas, the automaker announced Wednesday. The torque-rich engine doesn't match the 263-hp Mazdaspeed 3 that was...