For 2004, the new Unlimited model adds more versatility, capability, and comfort to the Jeep. The Unlimited has a 10-inch-longer wheelbase than other Wranglers and is 15 inches longer overall. The base SE model has a 147-hp 4-cylinder engine. X, Sport, Sahara, Rubicon, and Unlimited models have a 190-hp inline 6 cylinder engine. A four-speed automatic transmission is standard on the Unlimited and optional on other models in place of a five-speed manual. What do drivers like about the 2004 Jeep Wrangler? It's fun, versatile, and has good resale value. They dislike its fair gas mileage, noisiness, and small trunk.