The SR20DE is a 2.0-liter inline-four engine produced by Nissan. It features a dual overhead camshaft (DOHC) design and is known for its balance of performance and efficiency. This engine is part of the SR family of engines, which have been widely used in various Nissan models, including the 240SX and Sentra. The SR20DE is often praised for its tunability, making it popular among car enthusiasts and in motorsports. It typically produces around 140 to 150 horsepower, depending on the specific variant and application. Its robust design allows for modifications, enhancing its performance capabilities.