The base 2018 Nissan Altima provides 179 horsepower for enjoyable, safe driving in cities and on highways. It can also be upgraded to a 270 horsepower V6! Even with that upgrade, the 2018 Nissan Altima can't match the power and performance that comes standard on the 2018 Nissan Maxima. Every Maxima generates 300 horsepower!
The other Altima option is the 270 horsepower 3.5-liter V6, which gets a fuel economy much closer to the Maxima. The 2017 Maxima only has one engine option, but it is a big one. The Maxima comes with a standard 3.5-liter V6 that is capable of producing 300 horsepower.