The 2011 Cadillac CTS Sedan is a 4-door, 5-passenger luxury sedan, available in 10 trims, ranging from the 3.0L Base to the 3.6L.The 2011 Cadillac CTS Sedan 3.0L Base is equipped with a standard 3.0-liter, V6, 270-horsepower engine that achieves 16-mpg in the city and 26-mpg on the highway. A 6-speed manual transmission with overdrive is standard, and a 6-speed automatic transmission with overdrive is optional. The 3.6L Premium AWD is equipped with a standard 3.6-liter, V6, 304-horsepower engine that achieves 18-mpg in the city and 27-mpg on the highway. A 6-speed automatic transmission with overdrive is standard, and a 6-speed manual transmission with overdrive is optional.The 2011 Cadillac CTS ranks 4 out of 21 Upscale Midsize Cars. This ranking is based on our analysis of 47 published reviews and test drives of the Cadillac CTS, and our analysis of reliability and safety data.The 556 horsepower CTS-V Sedan. It’s the world’s fastest production sedan with 0–60 in a blistering 3.9 seconds.