The Honda R engine is an
inline-four engine launched in 2006 for the
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(non-Si). It is
fuel injected, has an aluminum-alloy
cylinder block
In an internal combustion engine, the engine block is the structure which contains the cylinders and other components. In an early automotive engine, the engine block consisted of just the cylinder block, to which a separate crankcase was attac ...
and
cylinder head, is a
SOHC
An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion cha ...
16-valve design (four valves per cylinder) and utilizes Honda's
i-VTEC system. The R series engine has a
compression ratio
The compression ratio is the ratio between the volume of the cylinder and combustion chamber in an internal combustion engine at their maximum and minimum values.
A fundamental specification for such engines, it is measured two ways: the stati ...
of 10.5:1, features a "
drive by wire" throttle system which is computer controlled to reduce
pumping losses and create a smooth torque curve.
The engine uses many advanced technologies to improve fuel economy and reduce friction. Piston rings are given an ion plating and weight is reduced with plastic and aluminum parts and
variable length intake manifolds that maintain ram air at a wide RPM range. The engine also features piston cooling jets, previously available only on high performance engines, and in the ninth-generation 1.8L Civic (2012-2015) the pistons are treated with
molybdenum disulfide
Molybdenum disulfide (or moly) is an inorganic compound composed of molybdenum and sulfur. Its chemical formula is .
The compound is classified as a transition metal dichalcogenide. It is a silvery black solid that occurs as the mineral molybdenit ...
applied in a polka-dot pattern. The automatic transmission model is rated at
California Air Resources Board (CARB) ULEV-2 (Ultra Low Emissions Vehicle) with fuel economy city, and highway. It also uses the same computer (
engine control unit
An engine control unit (ECU), also commonly called an engine control module (ECM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure optimal engine performance. It does this by re ...
) controlled
distributorless coil-on-plug
ignition
Ignition may refer to:
Science and technology
* Firelighting, the human act of creating a fire for warmth, cooking and other uses
* Combustion, an exothermic chemical reaction between a fuel and an oxidant
* Fusion ignition, the point at which a ...
as the Honda
K-series engines. As of September 2019, the R series engines were only offered outside of Japan.
R16
R16A
* Found in:
**
2006 Honda Civic (Singapore, Egypt, Turkey Market – FA1/FD series)
**
2012 Honda Civic (Singapore, Egypt, Turkey Market – FB series)
*** Displacement:
*** SOHC iVTEC (Chain driven cam)
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
*** Transmission: 5-speed
*** Redline: 6800 rpm
R16B
* Found in:
**
2016 Honda Civic (Singapore, Egypt, Turkey, Cyprus, South Africa, Ukraine and Brunei – FC series)
*** Displacement:
*** SOHC iVTEC (Chain driven cam)
*** Compression: 10.7:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
*** Transmission: CVT-7
*** Redline: 6700 rpm
R18
R18A1
* Found in:
**
2006–2012 Honda Civic (South Africa/Thailand/Malaysia/Indonesia/Philippines/Taiwan/Japan/Indian-market FD1, Brazil, American/Canadian-market FA1 & FG1)
** 2007–2009
Honda FR-V
The Honda FR-V, marketed as the Honda Edix in Japan, is a six-passenger car that was manufactured by Honda from 2004-2009 (with marketing ending in 2011 in some regions), over a single generation. A five-door compact multi-purpose vehicle (MP ...
(European-market BE1)
** 2008-2015
Honda City
** 2007-2014
Honda Stream
*** Displacement:
*** SOHC iVTEC (Chain driven cam)
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6300 rpm (Japanese Spec)
*** Torque: at 4,300 rpm
*** Fuel Cut Off: 6900 rpm
*** Redline: 6800 rpm
R18A2
* Found in:
** 2006–2011
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(European-market FN1 & FK2)
*** Displacement:
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6,300 rpm
*** Torque: at 4,300 rpm
*** cruising/economy happens during VTEC under cruising load only.
*** Redline: 6800 rpm
*** Fuel Cutoff : 7150 rpm
R18Z1
* Found in:
**2012–2015
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(FB2, FG3)
**2016–2020
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(FC6, FK5)
*** Displacement:
*** SOHC iVTEC (Chain driven cam)
*** Compression: 10.6:1
performance benefits from higher octane fuel
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
*** Redline: 6800
*** Fuel cut off: 7100
*** Single valve mode at low RPMs
**
iVTEC engageseconomy cam profile from 1000 rpm to 3500 rpm, under light engine load. Engine runs on power cam profile by default.
R18Z4
* Found in:
** 2012-2016 –
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(European-market FK2)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
*** Redline: 6800 rpm
*** Fuel cut off : 7100 rpm
*** cruising/economy happens during VTEC under cruising load only.
*** Balancer Shaft on this R18.
R18Z6
* Found in:
** 2013-2017 –
Honda Jade
*** Displacement:
*** SOHC iVTEC (Chain driven cam)
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R18Z9
* Found in:
** 2016 –
Honda HR-V
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R18ZF
* Found in:
** 2014 –
Honda HR-V (Thailand)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R20
R20A1
* Found in:
** 2007–2011
Honda CR-V
The Honda CR-V (also sold as the Honda Breeze in China since 2019) is a compact crossover SUV manufactured by the Japanese automaker Honda since 1995. The early model was built using the same platform as the Civic.
Honda began producing the CR ...
(RE1, RE2)
** 2008 –
Honda Stream (RSZ)
** 2013-2015
Acura ILX (DE1)
*** Displacement:
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6,200 rpm
*** Torque: at 4,200 rpm
*** Redline: 6800 rpm
*** Fuel cut off: 7100 rpm
*** SOHC run by timing chain
**
iVTEC engages economy cam profile from 1000 rpm to 3500 rpm, under light engine load. Engine runs on power cam profile by default
R20A2
* Found in:
** 2007–2011
Honda CR-V
The Honda CR-V (also sold as the Honda Breeze in China since 2019) is a compact crossover SUV manufactured by the Japanese automaker Honda since 1995. The early model was built using the same platform as the Civic.
Honda began producing the CR ...
(RE5)
*** Displacement:
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6,200 rpm
*** Torque: at 4,200 rpm
R20A3
* Found in:
** 2008–2012
Honda Accord (CP1) (156 hp)
** 2008–2015
Honda Accord (CU1/CN1/CW1) (156 hp)
** 2013–2020
Proton Perdana (CP3) (156 hp)
*** Displacement:
*** Compression: 10.5:1
*** Bore & stroke:
*** Power: at 6,300 rpm
*** Torque: at 4,300 rpm
R20A5
* Found in:
** 2012–2015
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(Southeast Asian FB3)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R20A6
* Found in:
** 2012-2016 –
Honda CR-V
The Honda CR-V (also sold as the Honda Breeze in China since 2019) is a compact crossover SUV manufactured by the Japanese automaker Honda since 1995. The early model was built using the same platform as the Civic.
Honda began producing the CR ...
(RM1, RM2)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R20A9
* Found in:
** 2012-2016 –
Honda CR-V
The Honda CR-V (also sold as the Honda Breeze in China since 2019) is a compact crossover SUV manufactured by the Japanese automaker Honda since 1995. The early model was built using the same platform as the Civic.
Honda began producing the CR ...
(RE6)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R20Z1
* Found in:
** 2012–2015
Honda Civic
The is a series of automobiles manufactured by Honda since 1972. Since 2000, the Civic has been categorized as a compact car, while previously it occupied the subcompact class. , the Civic is positioned between the Honda Fit/City and Honda Acc ...
(FB3)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: at 4,300 rpm
R20Z2/R20Z3
* Found in:
** 2013–2017
Honda Accord (CR1)
*** Displacement:
*** Compression: 10.6:1
*** Bore & stroke:
*** Power: at 6,500 rpm
*** Torque: a
LF (R20-based hybrid engine)
LFA1 (i-VTEC + Sport Hybrid “i-MMD” (Intelligent Multi Mode Drive))
*DOHC 16 valve
**
*
Honda Odyssey Hybrid/e:HEV (Japan, RC4)
*
Honda Stepwgn Hybrid/e:HEV (Japan, RP5)
LFB1 (i-VTEC + Sport Hybrid “i-MMD” Intelligent Multi Mode Drive)
*DOHC 16 valve
**Displacement:
**Bore x Stroke:
**Power (Engine): / 6,200 rpm
**Torque (Engine): / 3,500 rpm
**Power (Motor): / 5,000-6,000 rpm
**Torque (Motor): / 0–2,000 rpm
**Power (Combined): / 6,200 rpm
*
Honda Accord Hybrid (Thailand, CV3)
*
Honda Odyssey e:HEV Absolute (International, RC4)
LFB-13 (i-VTEC + Sport Hybrid “i-MMD” Intelligent Multi Mode Drive e:PHEV)
*DOHC 16 valve
**Displacement:
**Bore x Stroke:
**Power (Engine): / 6,200 rpm
**Torque (Engine): / 3,500 rpm
**Power (Motor): / 5,000-6,000 rpm
**Torque (Motor): / 0–2,000 rpm
**Power (Combined): / 6,200 rpm
*
Honda CR-V Sport Hybrid e+ (China)
LFB-H4 (i-VTEC + Sport Hybrid “i-MMD” Intelligent Multi Mode Drive)
*DOHC 16 valve
**Displacement:
**Bore x Stroke:
**Power (Engine): / 6,200 rpm
**Torque (Engine): / 3,500 rpm
**Power (Motor): / 5,000–6,000 rpm
**Torque (Motor): / 0–2,000 rpm
**Power (Combined): / 6,200 rpm
*
Honda Accord Hybrid (Japan, CV3)
*
Honda CR-V Hybrid (Japan, RT5–RT6)
*
Honda Odyssey Hybrid/e:HEV (Japan, RC4)
LFC-H4
*DOHC 16 valve
**Displacement:
**Bore x Stroke:
**Power (Engine): / 6,000 rpm
**Torque (Engine): / 4,500 rpm
**Power (Motor): / 5,000–6,000 rpm
**Torque (Motor): / 0–2,000 rpm
*
Honda Civic e:HEV (Japan/Europe, FL4/Thailand, FE4)
See also
*
Honda Engines
References
External links
Honda Worldwide, Honda Develops New 1.8l i-VTEC EngineHonda Worldwide, New 1.8l i-VTEC Engine (Video)Discussion and testing of higher octane fuel with Honda R18 engine
{{Honda automotive engine timeline (2000-present)
R
2006 introductions
Straight-four engines
Gasoline engines by model