The Honda Civic Si 4Dr is a four-door sedan version of the Honda Civic Si, a high-performance version of the Honda Civic. It features a turbocharged 1.5-liter 4-cylinder engine that produces up to 205 horsepower and 192 lb-ft of torque. It also comes with upgraded suspension and brakes, an exclusive body kit, and a host of other performance and styling enhancements.