The “Si” ( originally indicating “Sport injected”) is a trim of the Civic line from Honda. It’s Honda’s designation that the vehicle has upgraded performance characteristics compared to the other trims (LX, DX, EX, etc.). They often had different, more powerful engines installed from the factory, along with stiffer suspension and different tires for improved handling. The Si model followed the same body designs and general engineering as the other Civic models. This article summarizes the Si’s heritage and reviews the changes over the years.
Even if you’re not a gear-head, perhaps you can enjoy the aesthetic quality of these engines. These are machines designed to convert the oxygen in air and mixed-in fuel into rotational power. Most people don’t see their engines very often, but I find some of them to be strikingly beautiful, as if some consideration for style must have been considered in their design.
Honda B18C5 1.8L DOHC found in the 1997 – 2001 Acura Integra Type-R.
Same B18C5 engine as above, cleanly installed in a lightweight 1988-191 Honda CRX chassis.
Honda’s newer K-series, 2.0L.
Twin-turbo General Motors LS-series V8 built by CM Racing in a Chevrolet Corvette chassis.