The Mazda3 sedan comes with three levels of available equipment: Sport, Touring and Grand Touring. The entry-level i-model is available with a fuel-efficient, 148-hp 2.0-liter four-cylinder engine, while the sporty s-model is equipped with a sophisticated 156-hp 2.3-liter four-cylinder. The Mazda3 five-door hatchback comes standard with the 156-hp 2.3-liter engine. The five-door also comes in Sport, Touring and Grand Touring trim. The Mazdaspeed3 five-door comes with a 263-hp turbocharged 2.3-liter four-cylinder engine, five-speed manual transmission, limited-slip differential, stability control and 215/45YR18 tires.For 2007, Mazda has upgraded the appearance both inside and outside the Mazda3. The body shell, chassis rigidity, and suspension have also been tuned. A Mazdaspeed3 trim also joins the lineup.