It has 160 horsepower.
The 2005 Honda Civic Si, sold in the United States as the EP3 hatchback, used a 2.0-liter K-series engine (K20A3) with Honda's i-VTEC. This powertrain produced 160 horsepower and about 132 lb-ft of torque, pairing with a close-ratio 6-speed manual transmission for a high-revving, sporty driving experience.
Key specifications
Below are the essential specifications that define the 2005 Civic Si's performance characteristics:
- Engine: 2.0-liter inline-4 K20A3 with i-VTEC
- Horsepower: 160 hp (SAE net)
- Torque: 132 lb-ft (179 N·m)
- Transmission: 6-speed manual
- Redline: approximately 7,000 rpm
These attributes contributed to a lively, high-revving character typical of Honda's Si models of the era.
Context and comparisons
For perspective, the next generation of Civic Si, introduced for the 2006 model year, increased the output to about 197 horsepower, marking a notable step up in performance for the Si lineup. The 2005 EP3 version remains lighter and more about high-rev thrills than sheer horsepower.
Regional variations
Some markets outside North America offered different emissions tuning or minor adjustments; however, the common US-spec 2005 Civic Si horsepower rating is 160 hp.
Summary
In short, the 2005 Honda Civic Si has 160 horsepower from a 2.0-liter K20A3 engine, paired with a 6-speed manual and delivering a spirited, rev-happy driving experience within a compact, lightweight chassis.