The latest Nissan Frontier is offered in extended cab (King Cab) and crew-cab body styles. Trim levels include the economical S, the better-appointed SV, the more rugged Pro-4X and the top-of-the-line SL (crew cab only)., , The extended-cab S and SV trim levels offer a 152-horsepower, 2.5-liter four-cylinder engine and five-speed manual transmission as standard. A five-speed automatic is an available option. A robust 4.0-liter V6 making 261 hp is standard on the Pro-4X and all crew cabs. It is also an option on the SV extended cab., , In our reviews of the Nissan Frontier, we've been impressed by its rugged capabilities and easy-to-drive nature. It feels more maneuverable than its boxy styling and workaday purpose would suggest, and the optional V6 engine makes acceleration surprisingly quick. Downsides include uncomfortable rear seats and the lack of a regular-cab body style. But overall we highly recommend the Frontier to anyone who needs pickup functionality in a reasonably sized package.