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| 2016 Honda Civic Sedan |
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| 2016 Honda Civic Sedan |
For drivers looking for even greater performance coupled with equally high EPA fuel economy ratings, for the first time ever, the Civic is available with a turbocharged engine. The 1.5-liter 16-valve DOHC direct-injected turbocharged powerplant is rated at 174 horsepower at 5500 rpm with torque output an impressive 162 lb-ft. of torque between 1,800 and 5,500 rpm.
Both engines are LEV3-ULEV125/LEV3-SULEV 30 emissions compliant. The new, more efficient engines and transmissions, along with improved aerodynamics and a major reduction in running resistance, result in substantially enhanced performance and fuel efficiency. Compared to the previous Civic 1.8-liter with either manual transmission or CVT, anticipated EPA highway fuel economy ratings are up across the board:
+4 mpg on 2.0-liter with 6MT to 40
+2 mpg on 2.0-liter with CVT to 41
+3 mpg on 1.5-liter Turbo with CVT to 42
2.0-Liter In-Line 4 Cylinder
Related to the European Civic Type-R 2.0 liter turbo charged engine, the Civic's new standard 2.0-liter i-VTEC powerplant produces more horsepower and torque at all operating speeds compared to the 1.8-liter engine it replaces. The new engine also is anticipated to help the Civic receive superior EPA MPG ratings. The new 2.0-liter engine is rated at 158 horsepower at 6,500 rpm and 138 lb-ft. of torque at 4,200 rpm. The anticipated EPA fuel economy rating is 27/40/31 mpg city/highway/combined with 6-speed manual transmission, and 31/41/35 mpg with CVT.
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| 2016 Honda Civic Sedan |
The Civic's new 2.0-liter inline four has a lightweight die-cast aluminum block with a bedplate main-bearing design that creates a rigid assembly to help minimize noise and vibration. Cast-in iron cylinder liners provide long-lasting durability. Thin slits between each adjacent cylinder sleeve help improve engine cooling and knocking.
Each journal on the lightweight heat-forged steel crankshaft is micropolished to reduce internal friction and improve smoothness throughout the rpm range and help lower noise levels.
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| 2016 Honda Civic Sedan |
Designed with "cavity-shaped" crowns, the 2016 Civic's pistons help maintain stable combustion and contribute to improved efficiency. To reduce weight, minimize vibration and increase operating efficiency, the lightweight pistons have a carefully optimized skirt design. Ion-plated piston rings help reduce friction for greater operating efficiency. Heavy-duty steel connecting rods with tapered small ends are heat-forged in one piece and then "crack separated" to create lighter and stronger rods with an optimally fitted bearing cap.
Cylinder Head and i-VTEC Valvetrain
The Civic's 2.0-liter 4-cylinder engine has a lightweight DOHC cylinder head that is made of low-pressure casted aluminum alloy. With exhaust-port passages cast directly into the cylinder head, the need for a traditional separate exhaust manifold is eliminated.
A low-friction silent-chain drives dual overhead cams and four valves per cylinder. The cam drive is maintenance free throughout the life of the engine. To help further reduce friction, the finish of the camshaft journals has been improved. To improve cooling and detonation resistance, the cylinder head has a cooling passage placed between each pair of exhaust valves.
To help boost fuel efficiency and power, the combustion chamber shape and valve angles have been optimized. The included valve angle is 35 degrees, to decrease the surface-to-volume ratio of the combustion chambers and help create a flatter, more compact combustion chamber that reduces unburned hydrocarbon emissions. With this new combustion chamber shape, the compression ratio has been increased to 10.8:1 (up from 10.6:1 on the previous 1.8-liter engine), yet the engine still operates on regular unleaded fuel.
The cylinder head features a new high-tumble intake-port design. In combination with the new combustion chamber and piston crown shape, the design's high level of airflow tumble helps create a homogenous fuel mixture for low fuel consumption and high airflow for high power output.
The Civic's 2.0-liter DOHC 16-valve i-VTEC® engine uses an advanced valve control system to combine high power output with high fuel efficiency and low emissions. The system combines dual VTC (Variable Valve Timing Control), which continuously adjusts the intake and exhaust camshaft phase, with Variable Valve Timing and Lift Electronic Control (VTEC), which changes valve lift, timing and duration of the intake valves.
The "intelligent" portion of the system is its ability to continuously vary the timing of the intake and exhaust camshafts using variable valve timing control (VTC). This helps increase power and also provides a smoother idle (allowing idle speed to be reduced). The cam timing is varied based on input from sensors that monitor rpm, timing, throttle opening, cam position and exhaust air-fuel ratio. The result is increased fuel efficiency and lower emissions. Under certain conditions, the VTC can hold the intake valves open longer to allow a reverse airflow of intake air into the intake manifold.