The 2023 Civic Si carried over with no notable changes. The standard engine is a turbocharged 1.5-liter four-cylinder with 200 horsepower, and a six-speed manual gearbox is the only transmission available. This compact car's EPA-estimated fuel economy is 31 mpg in combined city and highway driving. The 2023 Honda Civic Si comes solely in a sedan body style that seats five people and provides 14.1 cubic-feet of trunk space. All models have a sport suspension and a limited-slip front differential to enhance performance, and wireless Apple CarPlay and Android Auto connectivity is standard.