The model has a bit more power and comes with some extra equipment as well as a tuned chassis.
The Honda Civic Si is powered by a 1.5-liter turbocharged four-cylinder engine that produces 150 kW and 260 N.m of torque to the front wheels. A new dual-coil silencer exhaust system has been installed to improve the aural experience.
This increases exhaust flow by 27%. It also has a new Active Sound Control system that claims to produce high-quality sound across a wider range of engine revs.
The engine also has a new single-mass flywheel, which is 26% lighter than the previous Si's dual-mass unit. This part aims to improve drivability by giving the engine a snappier throttle response for an even sportier driving experience.
Power is routed to the front wheels via a standard helical limited-slip differential to maximize available traction when accelerating.
The Honda Civic Si will be available only with a six-speed manual transmission with improved shift feel and 10% shorter throws. The improved feel is aided by a new, more rigid shift lever mounting bracket and a leather-wrapped aluminum shift knob similar to the Civic Type R's.
The Honda Civic Si's unique chassis setup, which includes an 8% increase in torsional rigidity and a 13% increase in bending rigidity over the previous Si, is the highlight. In comparison to the Civic Sedan, the spring rates are now 8% stiffer in the front and 54% stiffer in the rear.
New dampers have also been developed specifically for the Si.
The front MacPherson struts have reinforced upper mounts to handle the increased cornering loads, and the front (27 mm hollow) and rear (18 mm solid) stabilizer bars are thicker (27 mm hollow) than the Civic to reduce body roll.
The brakes on the Honda Civic Si are also larger than those on the standard Civic. Front rotors of 312 mm and rear rotors of 282 mm are standard, as are 235/40R18 performance tyres.
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