Nissan has accidently released a promotional video which reveals an uncamouflaged prototype of the 2013 Altima.

Nissan has accidently released a promotional video which reveals an uncamouflaged prototype of the 2013 Altima.

The clip was quickly removed, but a screen shot shows the model features an evolutionary design with angular headlights, a chrome grille and a swoopy character line.

As we have previously reported, the 2013 Altima will be introduced later this year with four- and six-cylinder engines. There will also be a hybrid variant which uses a supercharged 2.5-liter four-cylinder engine, an electric motor and a lithium-ion battery.