The Nitro was based on the Jeep Liberty and used the same 210-hp, 3.7-liter V6 engine. The R/T version features a 260-hp, 4.0-liter V6 and a firmer suspension. Pronounced body lean and vague steering detract from agility. The cabin is noisy, the ride is stiff and snappy, and the front end can become buoyant on the highway. The footwells are extremely narrow and 4WD models have a part-time system that lacks a low range. One nice feature is an optional sliding cargo floor that extends 18 inches rearward and is rated to hold 400 pounds. But overall the Nitro has little going for it, the driving position is awkward, plus fit and finish are subpar. The Nitro's last model year was 2011.