The 2015 Honda Civic Si uses a 2.4-liter inline-4 engine from Honda’s K-series family, the naturally aspirated K24Z7, paired with a 6-speed manual transmission.
Engine at a glance
These are the core hardware details that define the Si’s powerplant.
- 2.4-liter inline-4, DOHC, i-VTEC, 16 valves
- K-series engine family
- Naturally aspirated (no turbocharger)
- Engine code: K24Z7
- 6-speed manual transmission
- Front-wheel drive
In sum, the engine is designed for high-rev performance and a sporty, engaging character that complements the Si’s manual-focused driving experience.
Engine code and family
The 2.4L K-series engine in the 2015 Civic Si is designated K24Z7. It sits within Honda’s K-series family, which is known for strong rev performance and solid reliability across multiple models.
Power, torque, and driving characteristics
Performance figures and how the engine translates to road manners.
- Power: about 201 horsepower at 7,000 rpm
- Torque: about 172 lb-ft at 4,400–4,500 rpm
- Redline: around 7,000 rpm
- Drivetrain: front-wheel drive with a 6-speed manual
These specs reflect Honda’s emphasis on a high-rev, engaging driving experience rather than broad, low-end torque.
Context and how it compares
Unlike later Civic Si models that moved to turbocharged power, the 2015 Si relies on a naturally aspirated 2.4L engine tuned for rev-heavy performance. The result is a distinctly manual-focused, enthusiast-oriented character within the ninth-generation Civic lineup.
Summary
The 2015 Civic Si is powered by a 2.4-liter inline-4 K-series engine (K24Z7), naturally aspirated and paired with a 6-speed manual, delivering roughly 201 horsepower and 172 lb-ft of torque for a high-rev, engaging driving experience.