Pricing reflects a $200 increase over the base 2015 Altima.
Design upgrades include a look patterned after the 2016 Nissan Maxima full-size sedan. The Altima redesign includes a new front fascia, new hood and optional LED headlights and daytime running lights.
Nissan also adds a new Altima SR model to the lineup. It features 18-inch aluminum-alloy wheels, smoke-colored headlights, paddle shifters, a rear spoiler, unique suspension tuning and sport interior touches.
Pricing on the SR model was not announced. Full pricing on the 2016 model will be announced closer to launch date, a Nissan spokesman said.
All 2016 Altimas (there are seven models) get retuned steering and suspension, along with standard Siri Eyes Free.
The base model is equipped with a 2.5-liter four-cylinder engine that delivers 182 horsepower. It is linked to a continuously variable transmission (CVT).
The high-end Altimas are equipped with a 270-hp 3.5-liter V6 engine.
Nissan said the 2.5-liter engine features an expected 1-mpg increase for the highway fuel economy rating, bringing it to 39 mpg.
The EPA has not announced fuel economy numbers on the 2016 Altima.
Edmunds says: The 2016 Altima's Maxima-like design, improved fuel economy and sport-oriented SR model should make it a compelling choice for many shoppers in the market for a family sedan.