The Nissan Titan is available with either a gasoline or a diesel engine. Concerning the gasoline powertrain, it's a 5.6-liter V8, engineered by Nissan. Meanwhile, the diesel is a 5.0-liter turbo-diesel ISV V8 from Cummins. The diesel option has less horsepower than the gasoline engine - 310hp compared to a mighty 390hp. However, being a diesel, it has significantly more torque compared to the gasoline powertrain - 555lb-ft compared to just 394lb-ft of torque. Unfortunately, it was announced in 2020 that the Cummins diesel option would be dropped in favor of an updated gasoline engine. This time, the aforementioned 5.6-liter gasoline V8 could output 410hp and 413lb-ft of torque. This decision was driven by the fact that the Cummins variants of the Titan didn't sell well.