Now that the Nissan Altima has lost its Hybrid model, its fuel economy is just average for the class--despite its use of continuously variable transmissions.
Four-cylinder versions are the most efficient. In either coupe or sedan form, the Altima with the smaller engine and the CVT earns an EPA-rated 23/32 mpg. In the coupe, the four-cylinder Altima with a six-speed manual transmission checks in at a slightly lower 23/31 mpg.
Moving up to the V-6 versions, the CVT-equipped Altimas also sip less fuel. Sedans and coupes with the CVT are rated at 20/27 mpg, while the Coupe with the six-speed manual checks in at 18/27 mpg.
In all, the Altima's fuel economy numbers are respectable for the class, but not quite on par with a number of mid-size models, such as the latest editions of the Hyundai Sonata and Kia Optima, which both get 35 mpg highway.