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Civic Si Powertrain

The 2012 Civic Si is powered by a new 2.4-liter inline 4-cylinder engine that is the largest and most powerful of any Civic introduced in the United States. The dual overhead cam (DOHC) engine is an all-aluminum design that uses four valves per cylinder (16 valves total), a high-performance version of the i-VTEC® system and a specially tuned high-volume intake manifold. The Civic Si produces 201 horsepower – up four horsepower from the 2.0-liter engine it replaces. The i-VTEC® "intelligent" valve-control system, new friction-reducing technologies and extensive weight control measures helps the Civic Si deliver exhilarating acceleration, improved fuel economy and low exhaust emissions.

The new larger displacement engine in the Civic Si delivers peak power at a more accessible 7000 rpm compared to the previous Si engine's 7800 rpm power peak. The engine's increased displacement results in a substantial 22-percent increase in peak torque. The new 170 lb-ft rating occurs at just 4400 rpm, 1700 rpm lower than the previous engine's 139 lb-ft at 6100 rpm. Even with its increase in displacement, horsepower and torque, the 2012 Civic Si has an estimated EPA city rating of 22 mpg (up 1 mpg compared to the 2011 Civic Si) and increases highway fuel economy with a rating of 31 mpg (up 2 mpg compared to the 2011 Civic Si). In addition, the Civic Si engine meets strict Ultra-Low Emission Vehicle (ULEV-2) emissions standards.

The Civic Si is available exclusively with a 6-speed manual transmission with a short-throw shifter. Designed to be compact and lightweight, the 6-speed has also been engineered to provide quick and precise shift action. The Civic Si also includes a clutch with a torsion mechanism that enhances refinement in terms of engagement and feel.

Civic Si Powertrain at a Glance

Engine
•2.4-liter inline 4-cylinder engine
•Aluminum cylinder block with cast-in iron liners for light weight and durability
•16-valve DOHC i-VTEC® "intelligent" valve-control system
•High-flow, low backpressure exhaust system with sporty sound
•Maintenance Minder™ system

Emissions/Fuel Economy
•22/31/25 EPA-estimated city/highway/combined fuel economy (6MT)
•Ultra-Low Emission Vehicle (ULEV-2) emissions

Transmission
•6-speed manual transmission
•Helical-type limited-slip differential

Civic Hybrid Powertrain
The newest-generation Integrated Motor Assist (IMA) system fitted to the Civic Hybrid uses a gasoline engine as the primary source of power while an electric motor provides additional power and electricity regeneration capability. The new IMA system consists of a larger 1.5-liter i-VTEC® 4-cylinder engine connected to a larger, more powerful electric motor and a Continuously Variable Transmission (CVT). A new Lithium-Ion (Li-Ion) battery pack is used to capture and store electricity for the upgraded 23-horsepower electric motor. The new Lithium-Ion battery is more powerful, lighter and more compact than the nickel-metal hydride (NiMH) battery it replaces.

Together, the gasoline engine and electric motor team to produce 110 horsepower at 5500 rpm and 127 lb-ft of torque at 1000-3500 rpm. Compared to the previous generation Civic Hybrid, the new Civic Hybrid has the same peak horsepower, but achieves it at 500 fewer rpm. The new Hybrid has gained 4 lb-ft of torque, and it is spread over a wider rpm range (between 1000 rpm to 3500 rpm) for improved performance during normal city driving.

During acceleration, the engine or the engine and electric motor propel the vehicle. During sustained cruising, the gasoline engine and/or the electric motor can individually propel the vehicle. During braking, the gasoline engine deactivates and the electric motor acts as generator to replenish the Li-Ion battery pack. When the vehicle is at a stop, the engine can enter an idle-stop mode to conserve fuel and reduce emissions – and the engine remains off until the brake pedal is released.

Compared to the previous Civic Hybrid, the fifth-generation Honda IMA powertrain provides improved acceleration at highway speeds, while simultaneously delivering a combined city/highway EPA-estimated fuel economy rating of 44 mpg – an increase of 3 mpg from the previous model.

* Based on 2012 EPA mileage estimates. Use for comparison purposes only. Do not compare to models before 2008. Your actual mileage will vary depending on how you drive and maintain your vehicle.

Civic Hybrid Powertrain at a Glance

Engine
•1.5-liter inline 4-cylinder
•Aluminum cylinder block with CCS (Cooling Control Spacer)
•2-Stage i-VTEC® valve-control system
•i-VTEC®-controlled Variable Cylinder Management (VCM)
•“Intelligent” Dual & Sequential Ignition with two spark plugs per cylinder
•ECON mode

Integrated Motor Assist (IMA)
•23 horsepower (17 kilowatt) ultra-thin DC brushless motor
•Intelligent Power Unit (IPU) with Integrated Cooling Unit
•High-power Lithium-Ion battery
•Automatic Idle Stop
•Cooperative regenerative braking system

Emissions/Fuel Economy
•Ultra Low Emissions Vehicle (ULEV-2)
•Partial-Zero Emissions Vehicle (AT-PZEV) (in CARB states)
•EPA-estimated fuel economy of 44/44/44 (city/highway/combined)

Continuously Variable Transmission
•Wide drive ratio for good acceleration and low rpm cruising

Body

The new 2012 Civic Sedan and Civic Coupe are the most aerodynamically and aggressively styled models in the model's history – and also the most functional and versatile in how most Civic customers like to use their cars. As in past years, both 5-passenger sedan and 5-passenger coupe body styles are available. The sedan design is sophisticated and efficient, while the coupe is more dramatic and exciting. Both are highly aerodynamic, including a sleek windshield angle with narrow A-pillars (and thinner C-pillars in the Coupe) for excellent outward visibility, numerous under-vehicle aerodynamic aids, and even low rolling-resistance tires on all models except Civic Si.

Apart from the headlights, hood and front fenders, no visible exterior body panels, lights, glass, grille or bumpers are shared between the Civic Sedan and Civic Coupe. Differences between models include aggressive front grille, front and rear fascias and other elements for the Civic Si Coupe and Civic Si Sedan, and extensive aerodynamic aids for the high fuel economy Civic HF. However beneath the skin, the underlying chassis construction is the same between the Civic Sedan and Civic Coupe, except that at 105.1 inches, the wheelbase of the Civic Sedan is two inches longer than that of the Civic Coupe.

Civic Sedan Design
Though roomier inside than previous models, the 2012 Civic Sedan adds a sophisticated flair while retaining the Coupe's dramatic styling character. Its four doors provide improved utility, with excellent ingress and egress for all passengers. In back, the trunk lid gracefully meets the rear window and seamlessly ties in with the overall styling of the car. Standard are 15-inch diameter steel wheels with full wheel covers, 15-inch aluminum wheels for the Civic HF, 16-inch aluminum wheels for the Civic EX and Civic EX-L models, and 17-inch aluminum wheels for the Civic Si.

Civic Coupe Design
Everything about Civic Coupe says this is a driver's car, with the short, wide front fascia generating an aggressive overall look. Adding to the Civic's distinctly sporty and dynamic flavor are wide, angular headlights, a bold grille, and fog lamp openings in the lower fascia. A wedge design continues along the Civic Coupe body side, with the hood, windshield and cabin all forming decisive character lines that create a strong sense of motion. The high rear deck further reinforces the Coupe's dynamic wedge styling, while a functional rear lip spoiler and 16-inch aluminum wheels on Civic EX and Civic EX-L models (17-inch wheels on the Civic Si) add to its clear sporting intentions.


Advanced Compatibility Engineering (ACE™) Body Structure
The Advanced Compatibility Engineering™ (ACE™) body structure is a pioneering Honda unit-body construction technology. Introduced to Civic in the 2006 model, it increases the body's ability to disperse crash energy in a frontal collision and is anticipated to help deliver top safety ratings.

Rigid Unit-Body Construction and Energy-Absorbing Crush Zones
The Civic's aerodynamic unit-body structure plays a strong role in helping both the coupe and sedan achieve their expected high fuel-economy and projected top safety ratings, but it also contributes to a smooth, quiet ride and a fun-to-drive character. A rigid body allows for noise and other disturbances to be more efficiently isolated by bushings and other dampers throughout the vehicle.

Increased Use of High-Strength Steel
Both the Civic Sedan and Civic Coupe feature a rigid and lightweight unit-body design made possible by increased use of high-strength steel. The 2012 Civic Sedan now uses 55 percent high-strength steel, compared to 50 percent in the previous generation. This contributes to a 7-percent reduction in body weight compared to 2011 Civic Sedan. Although the body structure is now lighter, static and dynamic rigidity are 10 percent better.

In addition, more slender A-pillars (also constructed of high-strength steel) provide a greater field of view without compromising body strength. Along with a new side mirror shape, the thinner A-pillars also help minimize wind noise at highway speeds.

Aerodynamic Enhancements
The 2012 Civic Sedan and Civic Coupe are just as aerodynamically efficient as their appearance suggests, resulting in improved fuel efficiency, reduced emissions, improved handling at higher speeds and lower levels of interior noise. The improvements are the result of extensive modeling and testing conducted during the design process. Examples include:
•A guide under the front bumper directs the flow of air into the engine compartment for cooling.
•Lightweight plastic parts under the engine bay, the fuel tank and parts of the rear underbody enhance airflow.
•Front spoiler and strakes ahead of the front and rear tires help direct air flow around the tires and wheel wells.
•A new flat under-floor significantly improves aerodynamic efficiency by helping air to move over, around and under the vehicle – resulting in a significant 3.4-percent lower coefficient of drag as compared to the 2011 Civic.
•Low-drag side mirrors reduce wind noise by minimizing turbulence (Civic EX and Civic EX-L models also include heated side mirrors).

Multi-Reflector Halogen Headlights
All 2012 Civic models are equipped with multi-reflector halogen headlights with an auto-off feature (Auto On/Off on EX-L, Hybrid and Si) for confident nighttime driving, along with a dynamic and dramatic appearance. The auto-off feature automatically turns off the headlights when the key is removed from the vehicle. Inboard mounted halogen high beams offer further nighttime driving confidence with a crisp, bright and focused light beam. The halogen high beams serve double-duty as the daytime running lights (DRL) by operating at a lower voltage. All Civic models include a headlights-on reminder.

Meanwhile Civic Si Sedan and Coupe models add fog lights located in openings below the front bumper. Integrated fog lights are likewise available as a dealer-installed accessory on other 2012 Civic models.

LED Brake Lights on Civic Hybrid
The 2012 Civic Hybrid's taillight system features attention-grabbing LED illumination for the brake lights and soft glowing surface lighting for the taillights. The sculpted, 3-dimensional look of the units adds a distinctive and technical styling element to the rear view of the Civic. Additionally, LED lighting uses less power and longer service life compared to traditional tungsten light bulbs, which is consistent with the vehicle's emphasis on efficiency.

Power Windows
All 2012 Civic models (except for Civic DX) feature power windows with auto-reverse. All trim levels (except the Civic DX) also feature an auto up/down driver's window for added convenience.

One-Touch Power Moonroof with Tilt Feature
Civic EX, Civic EX-L and Civic Si models have one-touch power moonroof actuation with tilt feature that will open or close with one touch of the switch. The moonroof's thin construction allows for maximum headroom and improved comfort. Also included is a sliding sunshade that automatically opens with the moonroof, and the shade can be closed to block sunlight. An auto-reverse feature is built into the moonroof operation.

Security System with Remote Entry
Remote entry and remote trunk entry systems are now standard on all 2012 Civic models except for DX. Using a wave key with integrated remote buttons, all doors can be locked with one touch of the LOCK button. Pressing UNLOCK once unlocks the driver's door, while pressing it twice unlocks all doors. The trunk can also be unlocked by pressing a separate trunk button. The system has an operating range of up to 50 feet.

Cargo Area
Another strength of the new 2012 Civic Coupe and Sedan is impressive storage capacity. The Civic Sedan offers 12.5 cu-ft of storage space (12.1 cu-ft. for Sedan EX-L), exceeding the 12.0 cu-ft trunk volume of the previous generation – an improvement of 0.5 cu-ft or 4.2-percent. The Civic Coupe trunk offers 11.6 cu-ft of storage, a slight increase over the previous model's 11.5 cu-ft. Folding the second-row seatback yields additional room for the storage of bulky items. Civic Hybrid and Civic Natural Gas have a fixed rear seatback.

Conveniently placed latches enable customers to lower the fold-down rear seatback from the trunk. The Civic EX and Civic EX-L and Civic Si models add even more convenience with 60/40 split fold-down rear seatbacks, which allow simultaneous passenger seating and cargo storage.

Exterior Colors
The 2012 Civic offers a dynamic color palette that adds character and boldness to the entire model range. All-new colors for the 2012 Civic Sedan include Dyno Blue Pearl, Cool Mist Metallic and Crimson Pearl. While on the 2012 Civic Coupe, Dyno Blue Pearl and Cool Mist Metallic are new additions to the color lineup. Civic Si Coupe and Civic Si Sedan models add a unique Sunburst Orange Pearl, while the Civic Hybrid comes in Green Opal Metallic. All the new colors change in appearance depending on sunlight conditions, further amplifying the Civic's dramatic bodylines.
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