In 1986, the "S" evolved into the Civic Si, with added interior and exterior features along with suspension upgrades and fuel injection.
The 1988 to 1991 Civic Si Hatchback captured the attention of a growing number of sport compact-car enthusiasts, just as the market was beginning to emerge in the U.S.
Beginning in 1992, Civic Si Hatchback models incorporated Honda's famed VTEC® engine technology.
After a brief hiatus, the Civic Si reappeared in 1999 with a twin-cam VTEC® 4-cylinder engine that made 160 horsepower from 1.6-liters, a rarity in vehicles of its price range.
The 2002 Civic Si featured fresh and innovative styling with its distinctive short nose and exclusive 3-door package.
In 2006, a completely redesigned Si brought a 197-horsepower engine, plus new levels of performance, handling and styling.
2007 added four doors to the speed and performance Si package with the all-new Civic Si Sedan. The same power and attitude, just with more practical comforts.
The 2012 Si brought more muscle with a 201-horsepower engine (SAE net)[1] and greater torque. It also saw a weight reduction and improved aerodynamics, making the Si leaner and meaner than ever before.
2013 meant a tech upgrade for the Si with the addition of a rearview camera[2]. Its also got new style to match its smarts, with carbon weave on the instrument panel and a bold rear wing spoiler.
In 2014, a 205-horsepower engine (SAE net)[1], push-button start, and new two-toned seats took the Si racing heritage to the max. The new 7-inch Display Audio and HondaLink® systems added even more ingenious tech[3][4].
[1] @ 7000 rpm (SAE net).

[2] Always visually confirm that it is safe to drive before backing up; the rearview camera display does not provide complete information about all conditions and objects at the rear of your vehicle. The Civic Si Coupe is equipped with a rearview video system recommended by the National Highway Traffic Safety Administration. Information about crash avoidance technologies as part of the Government 5-Star Safety Ratings program can be found at www.safercar.gov.

[3] Check the HondaLink® website for smart phone compatibility and access to the Display Audio Interface.

[4] Depending on use, HondaLink® can transmit to Honda and its providers a vehicle's location, speed and other operating conditions, information that may be tied to the vehicle identification number (VIN) and can be combined to create a track of a vehicle. For a full explanation of HondaLink® functionality and Honda's data use and privacy policy, see http://owners.honda.com/hondalink