Nissan says the Titan has the largest standard engine in its class, with 317 hp. 385 lb.-ft. of torque, and up to 7,400 lbs of towing capacity. Payload is one ton. The 5.6-liter Endurance V-8 engine features a high-flow intake system that maximizes air intake. The removable tailgate is secured by a lock. “Wide Open” rear doors open 168 degrees.