Every engine, transmission, drivetrain and fuel economy combination the EPA certified for the 2005 Civic. 11 configurations listed, with city, highway and combined mpg, annual fuel cost and tailpipe CO₂ for each one.
| Engine | Transmission | Drive | City | Hwy | Comb. | L/100km | Fuel cost/yr | CO₂ g/mi | Fuel |
|---|---|---|---|---|---|---|---|---|---|
| 2L I4 | 5-speed manual | FWD | 22 | 28 | 25 | 9.4 | $2,700 | 355 | Regular Gasoline |
| 1.7L I4 | 4-speed automatic CLKUP | FWD | 25 | 34 | 29 | 8.1 | $2,300 | 306 | Regular Gasoline |
| 1.7L I4 CNG | Automatic (variable gear ratios) | FWD | 26 | 31 | 28 | 8.4 | $1,650 | 251 | Natural Gas |
| 1.7L I4 | 4-speed automatic CLKUP | FWD | 26 | 35 | 30 | 7.8 | $2,250 | 296 | Regular Gasoline |
| 1.7L I4 | 5-speed manual | FWD | 27 | 34 | 30 | 7.8 | $2,250 | 296 | Regular Gasoline |
| 1.7L I4 | Automatic (variable gear ratios) | FWD | 29 | 36 | 32 | 7.4 | $2,100 | 278 | Regular Gasoline |
| 1.7L I4 | 5-speed manual | FWD | 31 | 39 | 34 | 6.9 | $1,950 | 261 | Regular Gasoline |
| 1.3L I4 Hybrid · Start-stop | 5-speed manual SIL EMS | FWD | 37 | 45 | 40 | 5.9 | $1,700 | 222 | Regular Gasoline |
| 1.3L I4 Hybrid · Start-stop | 5-speed manual SIL EMS | FWD | 38 | 45 | 41 | 5.7 | $1,650 | 217 | Regular Gasoline |
| 1.3L I4 Hybrid · Start-stop | Automatic (variable gear ratios) EMS | FWD | 39 | 42 | 41 | 5.7 | $1,650 | 217 | Regular Gasoline |
| 1.3L I4 Hybrid · Start-stop | Automatic (variable gear ratios) EMS | FWD | 39 | 43 | 40 | 5.9 | $1,700 | 222 | Regular Gasoline |
mpg figures are the EPA window-sticker values in US gallons. The L/100km column is the same figure converted for metric readers. CO₂ is tailpipe only and excludes fuel production.
| Engine 1 | 1.7L I4 (Regular Gasoline) |
|---|---|
| Engine 2 | 2L I4 (Regular Gasoline) |
| Engine 3 | 1.3L I4 Hybrid (Regular Gasoline) |
| Engine 4 | 1.7L I4 CNG (Natural Gas) |
| Engine technology | CLKUP, EMS, HEV, HEV LB, LEAN BURN, SIL EMS, VTEC |
|---|---|
| Start-stop | Engine idle-stop system fitted on at least one configuration |
| Electrification | CNG, Hybrid |
| Drivetrain | FWD |
|---|---|
| Vehicle class | Compact Cars |
| Fuel types | Natural Gas, Regular Gasoline |
| Best combined | 41 mpg (5.7 L/100km) |
|---|---|
| Worst combined | 25 mpg (9.4 L/100km) |
| Spread | 25–41 mpg combined across configurations |
| Annual fuel cost (best) | $1,650 |
| Tailpipe CO₂ (best config) | 217 g/mile |
|---|---|
| Tailpipe CO₂ range | 217 – 355 g/mile across all configurations |
| 5-year fuel cost vs average new vehicle | $3,750 less |
Dimensions, curb weight, interior volume, oil capacity and torque specifications require official Honda documentation that we have not yet verified for this model year. They will be added once sourced.