2024 Honda Civic Si Mpg Comparison. Compare msrp, invoice pricing, and other features on the 2022 honda civic si and 2023 honda civic si and 2024 honda civic si. But the honda civic si's 31 mpg average is nothing to sneeze at.

 — as for the sportiest 2024 honda civics, the si returns 27 mpg city/37 mpg highway/31 mpg combined while the even more powerful civic type r comes in at 22. Research the 2024 honda civic si at cars.com and find specs, pricing, mpg, safety data, photos, videos, reviews and local inventory.