The 2000 Honda Civic EX model is equipped with a 1.6-liter inline-four engine, specifically the D16Y8 engine. This engine is part of Honda's D-series engine family and features Honda's VTEC (Variable Valve Timing and Lift Electronic Control) technology. The D16Y8 engine in the 2000 Civic EX produces around 127 horsepower and offers a good balance of performance and fuel efficiency. It is paired with a five-speed manual transmission or an optional four-speed automatic transmission.