Upon introduction, the 5-Spd AT is equipped with a standard 3.5-liter, V6, 280-horsepower engine that achieves 18-mpg in the city and 26-mpg on the highway. The 5-Spd AT SH-AWD w/Technology Package HPT is equipped with a standard 3.7-liter, V6, 305-horsepower engine that achieves 17-mpg in the city and 25-mpg on the highway. A 5-speed automatic transmission with overdrive is standard on both trims.
The 2009 TL is redesigned for 2009. Source: 2009 Acura TL