The 2004 model year serves as the third year of sales for the refreshingly fun and retro MINI brand. Continuing to be defined by the three-door Cooper hatchback for 2004, MINI shines as a premium compact. Buyers can choose between two MINI Cooper models for 2004 consisting of a base model propelled by a 115-horsepower engine or a sport-tuned Cooper S aided by a supercharged 163-horsepower powerplant. Starting in late 2003, a John Cooper Works upgrade kit is available in the United States for the MINI Cooper S model. The performance package extracts addition boost from the Cooper S' supercharger in order to generate 200 horsepower from the 1.6-liter engine.