Audi's sports car adds a V6 version to its 4-cyl lineup for 2004. TTs come as 4-seat hatchback coupes and 2-seat convertibles. Continuing is a turbocharged 1.8-liter 4-cyl engine, which has 180 hp in base TTs and 225 in uplevel models. Base TTs have front-wheel drive with traction control and a 6-speed automatic transmission with steering-wheel buttons for manual shifting. The 225-hp versions have Audi's quattro all-wheel drive and a 6-speed manual transmission. Added midyear was a 250-hp 3.2-liter V6 quattro model with Audi's new Direct Shift Gearbox, essentially a clutchless manual that can be set to shift like an automatic. All TTs include an antiskid system and front side airbags. A power top with heated glass rear window is standard on 225-hp and V6 convertibles, optional for the base ragtop. Xenon headlights are newly standard on all TTs.