The 3 Series sedan is also a technological leader. The latest version utilizes a magnesium and aluminum engine construction with variable valve timing producing even better performance numbers. Called the "N Series", this line of engines are lightweight and produce a more powerful motor than the previous engine, and will also yield a 15% increase in fuel economy.
This new engine technology also allows for BMW to return to turbo charging without a significant dent in terms of fuel economy. This means that the competition will be forced to develop their own engine abilities in order to keep up with BMW. Other upgraded features include active cruise control and steering. Once again, the 3 Series sedan continues to be the quintessential sport sedan.