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2012 Civic Natural Gas Specifications
Engineering
  Natural Gas
Engine Type In-Line 4-Cylinder
Engine Block/Cylinder Head Aluminum-Alloy
Displacement (cc) 1798
Horsepower @ rpm (SAE net) 110 @ 6500
Torque (lb-ft @ rpm) 106 @ 4300
Redline (rpm) 6700
Bore and Stroke (mm) 81 x 87.3
Compression Ratio 12.7 : 1
Valve Train 16-Valve SOHC i-VTEC®
Multi-Point Natural-Gas Fuel Injection Standard
Drive-by-Wire™ Throttle System Standard
Front-Wheel Drive Standard
Eco Assist™ System[1]  Standard
CARB Emissions Rating AT-PZEV[2] 
Direct Ignition System with Immobilizer Standard
Battery 12V-45Ah (20Hr)
Alternator 12V-95Ah
100K +/- Miles No Scheduled Tune-Ups* Standard
Transmission
  Natural Gas
Compact 5-Speed Automatic Transmission Standard
Gear Ratios: 1st: 2.666, 2nd: 1.534, 3rd: 1.022, 4th: 0.721, 5th: 0.525, Reverse: 1.957, Final Drive: 4.44 Standard
Body/Suspension/Chassis
  Natural Gas
Unit-Body Construction Standard
MacPherson Strut Front Suspension Standard
Multi-Link Rear Suspension Standard
Stabilizer Bars (mm., front/rear) 18.0 / 13.0
Motion-Adaptive Electric Power-Assisted Rack-and-Pinion Steering (EPS) Standard
Steering Wheel Turns, Lock-to-Lock 3.11
Steering Ratio 16.08
Turning Diameter, Curb-to-Curb (ft.) 34.8
Power-Assisted Ventilated Front Disc/Rear Drum Brakes (in., front/rear) 11.1 / 8.7
Wheels 15" Lightweight Alloys
All-Season Tires P195 / 65 R15 89H
Compact Spare Tire T135 / 80 D15 99M
 
[1]  Eco Assist is a trademark of Honda Motor Co., Ltd., and may not be used or reproduced without prior written approval.
[2]  AT-PZEV (Advanced Technology Partial Zero-Emission Vehicle) models as certified by the California Air Resources Board (CARB) are available in California and states that have adopted California Zero-Emission Vehicle regulations.