The 2007 Honda Civic Si uses the K20Z3, a 2.0-liter i-VTEC engine from Honda’s K-series lineup.
In the US-market 2007 Civic Si, Honda equipped it with a high-revving 2.0-liter inline-four known as the K20Z3. It sits within the K-series family and is paired with a close-ratio 6-speed manual transmission. The engine delivers about 201 horsepower and 139 lb-ft of torque, with a redline around 8,000 rpm, and features Honda’s i-VTEC variable valve timing technology to optimize performance across the rev range.
Engine designation and specifications
The following are core specs of the K20Z3 engine used in the 2007 Civic Si. This helps place the engine within Honda’s K-series lineup.
- Engine code: K20Z3
- Displacement: 2.0 L (1998 cc)
- Configuration: inline-4, 4 valves per cylinder, i-VTEC DOHC
- Maximum power: 201 horsepower (150 kW) at about 7,000 rpm
- Maximum torque: ~139 lb-ft (189 Nm) at around 6,000–6,500 rpm
- Redline: 8,000 rpm
- Compression ratio: approximately 11.0:1
- Fuel system: multi-point fuel injection with i-VTEC
- Induction: naturally aspirated
- Transmission: 6-speed manual (US Si)
Note: Figures reflect typical specifications for the 2007 Civic Si in the U.S. market; regional variations can exist.
Context within the K-series family
The K-series family comprises a range of 2.0–2.4 liter engines used across multiple Honda models. The K20Z3 is the performance-oriented variant tuned specifically for the Civic Si, offering a higher-revving character and distinct tuning compared with other K20 derivatives such as the K20A variants.
What sets the K20Z3 apart
Key distinguishing features include the 8,000 rpm redline, i-VTEC on the intake cam for enhanced top-end power, and ECU-focused tuning that emphasizes sport-oriented performance in the Si lineup.
Summary
In short, the 2007 Honda Civic Si is powered by Honda’s K-series 2.0-liter engine, the K20Z3, a high-revving, naturally aspirated inline-four delivering about 201 hp and 139 lb-ft of torque, paired with a six-speed manual transmission.