The new 2012 Honda Civic Si is powered by the new 2.4-liter engine delivers 201 hp at 7000 rpm and 170 lb-ft. torque at4300 rpm, an improvement of 4 hp and 31 lb-ft. of torque compared to the previous model. A sport-oriented six-speed manual transmission sends power to a helical-type limited-slip differential (LSD). The LSD helps the Honda Civic Si accelerate powerfully and confidently when exiting corners as both wheels can deliver more equal torque distribution to the road compared to a conventional open-type differential.

For the exterior, the new Honda Civic Si features 17-inch alloy wheels with 215/45R17 tires, a body-color deck lid spoiler with an LED center brake light, fog lights and a chrome exhaust finisher. Inside is an exclusive aluminum shift knob with leather, textured aluminum pedals and firmly bolstered perforated cloth sport seats with suede-like trim and red stitching. The steering wheel is leather-trimmed with red stitching. The new “intelligent” Multi-Information Display (i-MID) on the Honda Civic Si includes an exclusive Power Monitor (as one of its screens) that can indicate the percentage of total horsepower generated by the engine. In addition, a Sequential Rev-limit Indicator located on the upper instrument panel can show when the i-VTEC high-lift camshaft profile is engaged and incrementally when the engine redline is approached and reached.

The 2.4-liter inline 4-cylinder engine of the Honda Civic Si is constructed of lightweight aluminum and features a valvetrain system that incorporates dual overhead camshafts (DOHC) and four valves per cylinder (16 valves total). A performance version of Honda’s i-VTEC system pairs Variable Valve Timing and Lift Electronic Control (VTEC®) with Variable Timing Control™ (VTC™). The Honda Civic Si i-VTEC system allows for the production of both low-rpm torque and high-rpm horsepower, which can be a distinct benefit compared to conventional engine designs with fixed valve timing. A high-volume intake manifold and a high-flow, low-backpressure exhaust system elevates the sporty demeanor and aggressive sound of the Honda Civic Si. Dual balance shafts provide exceptional smoothness for a 4-cylinder engine.

The EPA-estimated city/highway/combined fuel economy rating of 22/31/25 miles per gallon is 1 mpg higher in the city and 2 mpg higher on the highway compared to the 2011 model. The Honda Civic Si engine also meets stringent Ultra Low Emission Vehicle (ULEV-2) tailpipe emissions standards.

The Honda Civic Si also has a 6-speed manual with a short-throw shifter is the only transmission available. Compact and lightweight, the transmission provides firm and direct shift action