Honda Civic GX - Specifications

Specifications

The GX was originally introduced with a 1.6 liter I4 engine. The 2001 model make-over carried a 1.7 liter engine. Beginning in model-year 2006, the 1.8 liter inline four-cylinder engine was introduced to the Civic lineup.

Compression in the Civic GX is 12.5:1, higher than that of most US pump gasoline-powered automobiles. The significantly higher compression ratio is usable without detonation due to the 120-octane natural gas that powers the car. Acceleration of the 2012 Civic Natural Gas is less than that of the comparable 4-door 2012 LX model due to both lower power (110 hp vs. 140 hp) and heavier weight (2848 lbs vs 2705 lbs). Zero-to-sixty times have been clocked at 12.6 seconds.

The CNG cylinder (fuel tank) is carried in the trunk of the car and holds 8.0 GGE (Gasoline Gallon Equivalent) at 3600 psi.

Range on a full 3600 psi fill is variable, depending on driving conditions and driving technique. While Honda claims an estimated 225–250 miles from a full CNG tank, independent tests have found a lower ranges, at 180–200 miles and "just over 200 miles" (about 300 km). For 2012 the EPA fuel economy increases with range increased to 225 ~ 250 miles. The EPA rates the 2009 Honda Civic GX at 24 equivalent MPG city and 36 equivalent MPG highway. Independent tests with mixed driving usage found rates of "nearly 32" and 26.8 equivalent MPG. The estimated fuel cost for this vehicle to drive 25 miles for a combination of city and highway driving is $1.47 using CNG. The GX qualifies for HOV Lane access in California, Arizona, Utah, and other states.