The 2008 Altima sedan will be available in four trims, but only the coupe is currently available in the new year's model, and it has two options. My test vehicle was the 2.5 liter, 4-cylinder with 175 horsepower and a six-speed manual transmission. There's also a 3.5-liter V6 option with 270 horsepower. A hybrid model will debut after the new year.