The 2007 Honda Civic Si uses a 2.0-liter inline-4 i-VTEC engine, code-named K20Z3, delivering about 197 horsepower and 139 lb-ft of torque, paired with a six-speed manual transmission.
In the 2007 Civic Si, Honda’s K-series engine delivers a high-revving, sporty character designed for enthusiasts. This article outlines the engine’s core specifications, how it fits into the Si lineup, and what owners should know about its features and market variations.
Core engine specs
The following figures represent the typical US-spec 2007 Civic Si engine and its performance envelope.
- Engine code: K20Z3 (US-market)
- Displacement: 2.0 liters (approximately 1,998 cc)
- Configuration: inline-4, DOHC with i-VTEC
- Power: ~197 horsepower
- Torque: ~139 lb-ft
- Redline: around 8,000 rpm
- Transmission: 6-speed manual
These specs show a high-revving engine designed for sporty performance and responsive throttle feel, a hallmark of the Civic Si.
Technology and features
The engine uses Honda’s i-VTEC system to optimize valve timing for efficiency at low revs and peak power at high revs. The K20Z3 employs variable intake timing and VTEC on the exhaust cam to improve performance across the rev range that the Si targets.
Key technology features that define the engine's character include the following:
- Valvetrain: i-VTEC with dual-stage intake cam timing
- Fuel system: multi-point fuel injection
- Drivetrain: front-wheel drive, front-engine layout
- Market support: strong aftermarket ecosystem for exhaust, intake, and tuning upgrades
These features contribute to a responsive, high-revving driving experience and align with Honda’s performance-oriented compact-car philosophy.
Market and variant notes
In North America, the 2007 Civic Si uses the K20Z3 engine and a six-speed manual. While the general architecture remains consistent across K-series variants, some markets or model years may utilize different K-series codes (such as K20Z1/Z3 variants) with minor tuning adjustments.
Bottom line
The 2007 Honda Civic Si is powered by a 2.0-liter inline-4 i-VTEC engine (K20Z3) delivering about 197 hp and 139 lb-ft of torque, paired with a 6-speed manual transmission for a sporty driving experience.
Summary
In short, the 2007 Civic Si’s engine is a high-revving 2.0-liter K-series i-VTEC that prioritizes power at higher RPMs, delivering spirited performance in a compact sedan/hatchback package.