The new Infiniti M45 is a great piece of equipment. It's very well engineered, and may be the highest combination of smooth and fast in a mid-size luxury car ever to come down the pike. BMW, Mercedes, Audi, Jaguar, and Cadillac have nothing for the M45's silky 340-horsepower engine.

The 2003 Infiniti M45 plays its dual role well, but we have trouble deciding whether it is a luxury car or a sports sedan. Its styling doesn't help, offering little distinction.

Check the dimensions, body styles, engines, transmissions, and more specs of the 2003 Infiniti M45. Additionally, roadtests.com provides information on the M's standard features and the prices of its various equipment levels, as well as crash test data for the safety savvy.