The 2007 Civic LX uses a 1.8-liter inline-four engine (Honda R18A1), producing about 140 horsepower.
This article explains the engine installed in the U.S.-market 2007 Civic LX, its key specifications, and how it fits into the broader Civic lineup for that model year. It also notes variations by market and trim where applicable.
Engine specifications
Key technical details for the LX’s powerplant as it appeared in the U.S. market in 2007.
- Displacement: 1.8 liters
- Engine code: R18A1
- Configuration: Inline-4
- Valvetrain: i-VTEC (on the intake cam), 16 valves
- Power output: ~140 horsepower
- Torque: ~128 lb-ft (174 N·m)
Note: These specifications describe the typical U.S.-spec LX engine. Variations can occur for different markets or model years.
Transmission options and performance
Overview of how the engine was paired with transmissions and what that meant for driving dynamics.
- 5-speed manual transmission
- 5-speed automatic transmission
In the 2007 Civic LX, either a 5-speed manual or a 5-speed automatic was offered, with the engine remaining the same across configurations. The choice of transmission primarily affected driving feel and fuel economy rather than engine output.
Context within the Civic lineup
How this engine fits relative to other Civic trims and model variants from the same generation.
Si and other variants
The Civic Si from the same generation uses a different, higher-output engine (a 2.0-liter engine) and is not representative of the LX’s powerplant. Other trims in 2007 generally shared the 1.8-liter engine, with differences arising mainly from transmission choice and equipment levels rather than engine displacement.
Summary
For the 2007 Honda Civic LX, the engine is a 1.8-liter inline-four (R18A1) rated around 140 hp, paired with either a manual or automatic 5-speed transmission. This combination defined the LX’s performance and efficiency in that model year, while Si and some market variants used different powertrains.