Most 2004 Civics use a 1.7-liter four-cylinder engine rated at 115 horsepower.
Horsepower varies by trim: the base DX/LX/EX share the same engine, the sportier Si delivers noticeably more power, and the Civic Hybrid uses a combined system that totals around 110 horsepower.
Engine options and horsepower by trim
The following figures reflect typical US-market specifications for the 2004 Civic lineup.
- DX, LX, and EX: 115 horsepower from the 1.7-liter inline-four (D17A1); torque around 110 lb-ft.
- Civic Si: about 160 horsepower from the 2.0-liter engine (K20A3); torque around 132 lb-ft.
- Civic Hybrid: combined output around 110 horsepower from the gas engine and electric motor.
These figures illustrate how the same model can feel quite different depending on the trim, with the Si providing the strongest performance and the Hybrid prioritizing efficiency.
Notes on regional variations
In markets outside the United States, tuning and emissions equipment can alter exact horsepower figures. The information above reflects typical US-market specifications for the 2004 Honda Civic lineup.
Summary
The 2004 Honda Civic's horsepower ranged from about 115 hp in the standard trims (DX/LX/EX) to roughly 160 hp in the sportier Si, with the Civic Hybrid delivering around 110 hp combined. For most buyers, power differences align with intended use: everyday driving with efficient trims, sportier acceleration with the Si, and eco-friendly driving with the Hybrid.