2016 Nissan Altima shows new attitude, improved performance (pictures)

Nissan's "Energetic Flow" design language makes the jump to the Altima from the Murano and Maxima.

New boomerang headlights are among the 2016 Altima's most notable changes.

The 2016 Altima wears Nissan's trademark V-Motion grille.

Appearance-wise, everything from the A-pillar forward is new for the 2016 Altima.

The previous fifth-generation Nissan Altima debuted for the 2013 model year.

The rear of the 2016 Nissan Altima includes updated lights as well as a new bumper and trunk lid.

Styling updates give the 2016 Nissan Altima a more aggressive appearance.

LED projector headlamps feature matching daytime running lamps.

SR models of the 2016 Nissan Altima come with a decklid spoiler.

The Altima accounts for roughly 27 percent of Nissan sales -- it's hugely important.

This new SR trim aims to poach customers from Toyota's Camry SE and Honda's Accord Sport.

Chrome exhaust tips are nicely integrated into the lower fascia.

Nissan Altima SR models ride on exclusive 18-inch wheel designs and feature higher-performance Dunlop all-season tires.

Nissan has updated the Altima's four-cylinder engine with a revised compression ratio, reduced internal engine friction and optimized oil pump.

The 2.5-liter four-cylinder engine produces 182 horsepower and 180 pound-feet of torque, the same figures as last year.

The Altima's updated interior is quieter than before thanks to an acoustic windshield and more sound deadening.

Steering wheel controls and paddle shifters on the 2016 Nissan Altima SR.

The 4-inch Advanced Driver-Assist Display is sandwiched between a pair of large analog gauges.

There are lots of minor but thoughtful updates throughout the 2016 Altima's cabin.

A 5-inch color display on the center stack is standard on the 2016 Nissan Altima.

Auxiliary and USB inputs are easy to find, but a second USB plug would be a welcome addition.

Even the door handles get a fresh look on the 2016 Nissan Altima.

Blue accent stitching on the steering wheel and shift knob are exclusive to the 2016 Nissan Atlima SR.

Blue accent stitching is also featured on the SR's seats.

The Altima's backseat continues to be spacious and welcoming.

There's 15.4 cubic-feet of trunk space in the 2016 Nissan Altima.