The 2019 Altima has a secret weapon

The new 2019 Nissan Altima is affordable, carries a whole host of new tech, and is far more memorable to look at than its predecessor, but the smartest upgrade you need to lift the hood to see. While the new Altima’s standard engine may be a 2.5-liter naturally-aspirated four cylinder, Nissan saves the real magic for the upgrade option. Nissan …