The Honda R engine is an

inline-four engine A straight-four engine (also called an inline-four) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The vast majority of automotive four-cylinder engines use a straight-four layout (with the ...

launched in 2006 for the Honda Civic (non-Si). It is

fuel injected Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All comp ...

, has an aluminum-alloy cylinder block and

cylinder head In an internal combustion engine, the cylinder head (often abbreviated to simply "head") sits above the cylinders and forms the roof of the combustion chamber. In sidevalve engines, the head is a simple sheet of metal; whereas in more modern ...

, is a SOHC 16-valve design (four valves per cylinder) and utilizes Honda's

i-VTEC VTEC (Variable Valve Timing & Lift Electronic Control) is a system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at lo ...

system. The R series engine has a compression ratio of 10.5:1, features a "

drive by wire Drive by wire, DbW, by-wire, steer-by-wire, fly-by-wire or x-by-wire technology in the automotive or aviation industry is the use of electrical or electro-mechanical systems for performing vehicle functions traditionally achieved by mechanical link ...

" 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 manifold In internal combustion engines, a variable-length intake manifold (VLIM),variable intake manifold (VIM), or variable intake system (VIS) is an automobile internal combustion engine manifold technology. As the name implies, VLIM/VIM/VIS can vary ...

s 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 applied in a polka-dot pattern. The automatic transmission model is rated at

California Air Resources Board The California Air Resources Board (CARB or ARB) is the "clean air agency" of the government of California. Established in 1967 when then-governor Ronald Reagan signed the Mulford-Carrell Act, combining the Bureau of Air Sanitation and the Moto ...

(CARB) ULEV-2 (Ultra Low Emissions Vehicle) with fuel economy city, and highway. It also uses the same computer ( engine control unit) controlled distributorless coil-on-plug ignition 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 (European-market BE1) ** 2008-2015

Honda City The is a subcompact car which has been produced by the Japanese manufacturer Honda since 1981. The City was originally a 3-door hatchback/2-door convertible for the Japanese, European and Australasian markets. The 3-door City was retired in 199 ...

** 2007-2014

Honda Stream The Honda Stream is a car manufactured by the Japanese automaker Honda since October 2000. The second generation model was officially presented on 13 July 2006. It has been described as a multi-purpose vehicle (MPV) or as an estate car. __TOC__ ...

*** 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 (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 (FB2, FG3) **2016–2020 Honda Civic (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 engages
economy 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 (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 The Honda HR-V is a subcompact crossover SUV (B-segment) manufactured and marketed by Honda over three generations. The first generation HR-V was based on the Honda Logo. It was marketed from 1999 to 2006 in Europe, Japan and select Asia-Pac ...

*** Displacement: *** Compression: 10.6:1 *** Bore & stroke: *** Power: at 6,500 rpm *** Torque: at 4,300 rpm

R18ZF

* Found in: ** 2014 –

(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 (RE1, RE2) ** 2008 –

(RSZ) ** 2013-2015

Acura ILX The Acura ILX is a subcompact executive car manufactured and marketed by Honda under the Acura brand, based on the ninth-generation Civic sedan. The ILX replaced the Canadian market exclusive Acura CSX. The ILX was Acura's first gasoline-electri ...

(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 (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 The , also known as the in Japan and China for certain generations, is a series of cars manufactured by Honda since 1976, best known for its four-door sedan variant, which has been one of the best-selling cars in the United States since 1989. ...

(CP1) (156 hp) ** 2008–2015

(CU1/CN1/CW1) (156 hp) ** 2013–2020

Proton Perdana The Proton Perdana is a series of four-door Mid-size car, mid-size Sedan (car), saloon cars produced by Malaysian automobile manufacturer Proton Holdings, Proton. There are two notable generations of the Proton Perdana. The first generation Prot ...

(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 (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 (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 (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 (FB3) *** Displacement: *** Compression: 10.6:1 *** Bore & stroke: *** Power: at 6,500 rpm *** Torque: at 4,300 rpm

R20Z2/R20Z3

* Found in: ** 2013–2017

(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 The , also known as the in Japan and China for certain generations, is a series of cars manufactured by Honda since 1976, best known for its four-door sedan variant, which has been one of the best-selling cars in the United States since 1989. ...

(Thailand, CV3) * Honda Odyssey e:HEV Absolute (International, RC4)

LFB-13 (i-VTEC + Sport Hybrid “i-MMD” Intelligent Multi Mode Drive e:PHEV)

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 *

(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)

References

External links

Honda Worldwide, Honda Develops New 1.8l i-VTEC Engine

Honda 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

R16