SR20DE

The SR20DE is a 2.0-liter inline-4 engine produced by Nissan as part of the SR engine family. It was used in a range of Nissan passenger cars and sporty models during the 1990s and early 2000s, serving as the naturally aspirated, four-valve-per-cylinder variant of the line. The DE designation indicates a double overhead camshaft, four valves per cylinder, and electronic fuel injection.

Design and specifications include a 1998 cc displacement, inline-4 configuration, DOHC with four valves per cylinder, and a cast-iron block paired with an aluminum cylinder head. The engine is typically driven by a timing chain and is generally considered an interference design, meaning timing must be maintained to avoid valve contact with the piston.

Performance and market differences mean power outputs vary, but naturally aspirated SR20DE engines commonly produced roughly 140–150 horsepower with peak torque around the low to mid 130s pound-feet, depending on market specifications and emissions equipment. The engine emphasized broad, usable torque and smooth operation suitable for daily driving and light-performance applications.

Applications and legacy include use in several Nissan compact sedans and sportier models, such as Sentra and Primera variants, and appearances in non-turbo forms within the Silvia/180SX lineup in some markets. The SR20DE sits alongside turbocharged SR20DET and other SR family members, and in later years many markets shifted toward newer 2.0-liter designs such as the MR20DE. The engine is remembered for its durability, mid-range torque, and wide aftermarket support.