From Dodge press: The 2009 Dodge Nitro builds on the success of Nitro models back to 2007, when it was introduced as the first mid-size SUV for the Dodge brand.
Chassis improvements for 2009 Dodge Nitro include stiffer rear axle shafts, retuned springs, shocks, anti-roll bars and steering gear valve. These enhancements provide a more precise, linear feel when driving and improve steering and handling. Additional improvements to brake pedal feel are achieved through a retuned booster, low rollback calipers and a revised brake pedal ratio.
The 3.7-liter SOHC standard V-6 engine on the 2009 Dodge Nitro SE and SLT models is efficient, durable and smooth. It produces 210 hp (157 kW) @ 5,200 rpm and 235 lb.-ft. (319 N•m) of torque @ 4,000 rpm. Refinements in the valve train and combustion chamber enhance low-speed torque, while providing a smooth idle and minimal engine noise. A sophisticated electronic throttle control system tailors throttle response to pedal movement based on operating conditions and maintains a consistent vehicle speed on rolling grades when cruise control is active. There is also an exhaust gas recirculation valve on the engine that helps increase fuel economy.
The performance-oriented, 4.0-liter single-overhead-cam (SOHC) V-6 engine that is standard on the Dodge Nitro R/T model is designed to provide the power and torque required to make the vehicle a leader in the mid-size SUV segment. The engine delivers 260 hp (194 kW) @ 6,000 rpm and 265 lb.-ft. (359 N•m) of torque @ 4,200 rpm. The 4.0-liter SOHC V-6 engine provides more power and torque than the 3.5-liter engine on which it is based with an emphasis on low- and mid-range operation to meet the needs of the day-to-day driver.
For key diesel markets outside North America, the Dodge Nitro is offered with a diesel engine.