The 2012 Honda Civic's 1.8-liter four-cylinder engine produces 140 horsepower.
In more detail, this engine, coded as R18A1, is an inline-4 with i-VTEC that delivers 140 hp at 6,500 rpm and 128 lb-ft of torque at 4,600 rpm. It’s paired with either a 5-speed manual or a 5-speed automatic transmission, depending on trim, while the high-performance Civic Si uses a different engine with more power.
Engine specifications
The following outlines the core horsepower-related specs of the 2012 Civic's 1.8 L engine.
- Engine: 1.8 L inline-4 (R18A1) with i-VTEC
- Horsepower: 140 hp @ 6,500 rpm
- Torque: 128 lb-ft @ 4,600 rpm
- Configuration: Naturally aspirated, multi-point fuel injection
- Transmission options: 5-speed manual or 5-speed automatic
These specifications apply to the non-Si Civic models in the U.S. market for 2012.
Context and market notes
In the broader context, Honda used the 1.8 L engine across multiple Civic generations with refinements over time. The 140 hp rating is the SAE net horsepower figure cited for the 2012 model year in U.S. materials, while the performance-focused Civic Si is powered by a different, higher-output engine.
Summary
For the 2012 Honda Civic, the 1.8 L four-cylinder engine delivers 140 horsepower and 128 lb-ft of torque, available with either a 5-speed manual or a 5-speed automatic transmission on LX, EX, and EX-L trims. The Si model uses a separate, more powerful engine.