Every engine, transmission, drivetrain and fuel economy combination
the EPA certified for the 2021 Clarity. 2 configurations listed,
with city, highway and combined mpg, annual fuel cost and tailpipe CO₂ for each one.
Engine and transmission combinations
Engine
Transmission
Drive
City
Hwy
Comb.
L/100km
Fuel cost/yr
CO₂ g/mi
Fuel
1.5L I4 Plug-in Hybrid · Start-stop
Automatic (variable gear ratios)
FWD
44
40
42
5.6
$1,600
57
Regular Gasoline
— FCV · Start-stop
Automatic (A1)
FWD
68
67
68
3.5
—
—
Hydrogen
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 summary
Engine 1
1.5L I4 Plug-in Hybrid (Regular Gasoline)
Engine 2
FCV (Hydrogen)
Engine technology and equipment
Engine technology
PEM, PHEV
Start-stop
Engine idle-stop system fitted on at least one configuration
Electrification
FCV, Plug-in Hybrid
Electric motor
130 kW AC PMSM, 135kW AC PMSM
Electric range
360 miles
Manufacturer config codes
HNX
Drivetrain and class
Drivetrain
FWD
Vehicle class
Midsize Cars
Fuel types
Hydrogen, Regular Gasoline
Fuel economy range
Best combined
68 mpg
(3.5 L/100km)
Worst combined
42 mpg
(5.6 L/100km)
Spread
42–68 mpg combined across configurations
Annual fuel cost (best)
—
Emissions and running cost
EPA fuel economy score
10 / 10
EPA greenhouse gas score
10 / 10
5-year fuel cost vs average new vehicle
$12,000 less
Not yet published
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.