Chassis Code: FA5 (Sedan) / FG2 (Coupe)
The Dharma: "Balance."
The 8th Generation Civic (2006–2011) was a "clean sheet" redesign. The development team split the global Civic into two distinct platforms: one for Europe (Hatch) and one for the US/Japan (Sedan/Coupe).
The US model adopted a futuristic "One-Motion" profile with a massive windshield rake. Inside, it featured the controversial "Two-Tier" dashboard, placing the speedometer at the base of the windshield (heads-up style) and the tachometer directly behind the wheel. It was data visualization before it was cool.
"The Standard LSD"
The chassis rigidity was increased by 35% over the Gen 7. But the real news was the traction management.
Helical Limited-Slip Differential (LSD): This is the defining feature of Gen 8. For the first time, a real mechanical LSD was standard equipment on the Si.
The Logic: In a FWD car, open differentials send power to the wheel with the least grip (the inside wheel in a turn). The LSD mechanically locks the wheels, pulling the car into the apex.
The Result: You could throttle out of a corner mid-turn without understeering into the bushes.
Suspension: MacPherson Struts (Front) / Reactive-Link Double Wishbone (Rear). The rear setup was compact but extremely effective at passive toe-control..
"The Last Samurai"
Engine Code: K20Z3 Type: Inline-4 DOHC i-VTEC Displacement: 1998cc
This engine is legendary. It is widely considered the best version of the K20 ever sold in the US.
True VTEC: Unlike later "economy" VTEC implementations, the K20Z3 had high-lift cam lobes on both the intake and exhaust.
The Sound: At 5,800 RPM, the VTEC crossover was violent. The intake noise was tuned to resonate in the cabin, creating an addictive mechanical wail.
The Output:
Horsepower: 197 hp @ 7,800 rpm.
Torque: 139 lb-ft @ 6,100 rpm.
Redline: 8,000 rpm. (The tachometer went to 9,000).
"The Sixth Gear"
The Si finally received a 6-Speed Manual Transmission.
Ratios: extremely short. You had to shift constantly to stay in the power band (above 6,000 RPM).
The Grind: This transmission had a notorious "3rd Gear Grind" issue in early models (Synchro set replacements were a common warranty claim), reminding owners that mechanical systems have physical flaws.
Pedal Feel: Light, precise, and perfectly spaced for heel-toe downshifting.
"The Unicorn"
In 2008, Honda US released the Civic Mugen Si Sedan.
The Specs: It had the same engine (197 hp) but featured a specific suspension tuned by Mugen (Honda's factory tuner), forged GP wheels, a massive rear wing, and a sport exhaust.
The Price: It cost $30,000 (huge money in 2008), making it rare and controversial. Today, it is a collector's item.
[POWERTRAIN]
Engine Code: K20Z3
Displacement: 1998 cc
Induction: PGM-FI + i-VTEC
VTEC Crossover: 5,800 rpm
Redline: 8,000 rpm
[CHASSIS_DYNAMICS]
Curb Weight: ~2,895 lbs (Sedan)
Differential: Helical LSD (Standard)
Brakes (Front): 11.8-inch Vented Disc
Brakes (Rear): 10.2-inch Solid Disc
[ROLLING_STOCK]
Wheels: 17-inch Alloy (5-Spoke)
Tires: 215/45R17 (Michelin Pilot Exalto PE2)
Bolt Pattern: 5 x 114.3