Performance

• When introduced, the 4.0-liter I-6 engine was paired with a five-speed manual or optional three-speed automatic transmission. In 1991 the engine was rated at 180 horsepower according to the Edmunds automotive website. In its final year of production, 2006, this engine was paired with a six-speed manual or four-speed automatic transmission and rated at 190 horsepower and 235 pound-feet of torque.
  
  

Specifications

• Sitting on a 93.4-inch wheelbase, the 2006 Jeep Wrangler is 155.4 inches long and 66.7 inches wide. Nearly 6 feet high, this Wrangler weighs 4,450 pounds and has a payload capacity of 800 pounds and towing limit of 2,000 pounds.
  
  

Fuel Economy

• Paired with a six-speed manual transmission, the inline-six gets 13 mpg city, 17 mpg highway; its rating is 13 mpg city, 16 mpg highway with the automatic transmission.