Fuel economy is stated at 22 mpg in the city, 31 mpg on the highway, and 25 mpg combined. These estimates are the same for both the coupe and sedan variants.
Personally, I think the sedan variant is a bit stylistically bland when compared to the coupe, but some drivers may prefer its less "attention grabbing" aesthetic.
The coupe and sedan have identically stated curb weights, but the sedan is just a tad longer with a 2-inch longer wheelbase and a slightly wider (+7.2 inches) turning radius.
The sedan also has a slightly higher roofline. Along with the increased wheelbase, this translates into a slightly more interior space for people and cargo.
When the right turn signal is activated (or this LaneWatch button is pressed) a side camera activates, displaying a view into the passenger side blindspot.
By design, it would seem, the Civic Si is light on driver aid tech. There's just the two cameras -- rearview and LaneWatch -- and no blind-spot monitoring, forward-collision alert or proximity sensing.
Sport pedals feature aluminum surfaces and rubber nibs for increased grip. I found the Si's clutch pedal's engagement to be a bit too light for my personal sporting tastes.
Instrumentation is identical to that of the standard Civic -- which is to say that it's fairly overly complex and spread out across the dashboard. The Si features red detailing rather than blue.
At speed, the i-VTEC indicator lets the driver know when Honda's variable valve timing is in its most aggressive mode. A sequence of additional lights act as indicators of RPM and shift lights.
The infotainment system ties into the trip computer and can display fuel economy information on its screen. Many of the HondaLink and the MID's functions are redundant between the two displays.
The rear camera is also standard. I found the default viewing angle to be a bit too narrow, but models equipped with navigation can toggle between three progressively wider viewing angles.
I've got two major gripes with the HondaLink infotainment setup. The first is that it's simply sluggish to react to almost all inputs. The other is that the capacitive volume controls can be difficult to handle precisely.
