At last year’s Los Angeles Auto Show, Honda unveiled the Civic Si Prototype, which previewed a new high-performance version of the popular model. Said to go on sale this year in both coupe and sedan bodystyles, our spy photographers managed to capture the latter as it undergoes testing in Ohio, United States.

The test mule seen here is wearing quite a bit of camouflage to hide its front and rear bumper, although we should expect the production version to largely mimic the Prototype’s styling. Items like front and rear splitters, a lowered rear wing as well as a hexagonal-shaped exhaust tip (some of which are seen here) should be part its get-up.

As for the interior, there should be plenty of red accents to highlight its sportier nature. Honda has already stated the Prototype’s interior is as close to the final product as possible, so sports seats, red stitching, Si logos, red instrument panel and aluminium sports pedals should appear on the production version.

The same is said of what will be fitted under a hood. On the Prototype, a 1.5 litre turbocharged four-cylinder with dual variable cam timing (VTC) provides drive, mated to a short-shifting six-speed manual transmission. Along with a new active damper system, active steering system, limited-slip differential and high-performance tyres, the Civic Si should be a step up from the regular car, although it is likely no match for the upcoming Civic Type R.

GALLERY: Honda Civic Si Prototype