Honda R engine

(Learn how and when to remove this message)

Reciprocating internal combustion engine

Honda R engine

Overview
Manufacturer	Honda Motor Co Ltd
Production	2006–present
Layout
Configuration	Naturally aspirated Straight-4
Displacement	1.6–2.0 L; 97.3–121.9 cu in (1,595–1,997 cc)
Cylinder bore	81 mm (3.19 in)
Piston stroke	77.4 mm (3.05 in) 87.3 mm (3.44 in) 96.9 mm (3.81 in)
Cylinder block material	Aluminum alloy
Cylinder head material	Aluminum alloy
Valvetrain	SOHC 4 valves x cyl. with i-VTEC DOHC 4 valves x cyl. with i-VTEC (LF Hybrid engine)
Compression ratio	10.5:1-10.7:1
RPM range
Max. engine speed	6800
Combustion
Fuel system	PGM-FI
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	125–156 PS (92–115 kW; 123–154 bhp)
Torque output	15.4–19.4 kg⋅m (151–190 N⋅m; 111–140 lb⋅ft)

The Honda R engine is an inline-four engine launched in 2006 for the Honda Civic (non-Si). It is fuel injected, has an aluminum-alloy cylinder block and cylinder head, is a SOHC 16-valve design (four valves per cylinder) and utilizes Honda's i-VTEC system. The R series engine has a compression ratio 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 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 25 mpg_‑US (9.4 L/100 km; 30 mpg_‑imp) city, and 36 mpg_‑US (6.5 L/100 km; 43 mpg_‑imp) 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: 1.6 L; 97.3 cu in (1,595 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 77.4 mm (3.19 in × 3.05 in)
  - Power: 125 PS (92 kW; 123 bhp) at 6,500 rpm
  - Torque: 15.4 kg⋅m (151 N⋅m; 111 lb⋅ft) at 4,300 rpm
  - Transmission: 5-speed
  - Redline: 6800 rpm

R16B

Found in:
- 2016 Honda Civic (Mauritius, Singapore, Egypt, Turkey, Cyprus, South Africa, Ukraine and Brunei – FC series)
  - Displacement: 1.6 L; 97.5 cu in (1,597 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.7:1
  - Bore & stroke: 81 mm × 77.5 mm (3.19 in × 3.05 in)
  - Power: 125 PS (92 kW; 123 bhp) at 6,500 rpm
  - Torque: 15.6 kg⋅m (153 N⋅m; 113 lb⋅ft) at 4,300 rpm
  - Transmission: CVT-7
  - Redline: 6700 rpm

R18

R18A1

Found in:
- 2006–2011 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
- 2007-2014 Honda Stream
  - Displacement: 1.8 L; 109.8 cu in (1,799 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 141 PS (104 kW; 139 bhp) at 6300 rpm (Japanese Spec)
  - Torque: 17.7 kg⋅m (174 N⋅m; 128 lb⋅ft) at 4,300 rpm
  - Fuel Cut Off: 6900 rpm
  - Redline: 6800 rpm

R18A2

Found in:
- 2006–2011 Honda Civic (European-market FN1 & FK2)
  - Displacement: 1.8 L; 109.8 cu in (1,799 cc)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 140 PS (103 kW; 138 hp) at 6,300 rpm
  - Torque: 17.7 kg⋅m (174 N⋅m; 128 lb⋅ft) at 4,300 rpm
  - cruising/economy happens during VTEC under cruising load only.
  - Redline: 6800 rpm
  - Fuel Cutoff : 7150 rpm

R18A6

Found in:
- 2006–2011 Honda Civic (Brazil)
- Local Fuel optimization (FlexFuel - Ethanol or Gasoline)
- Power: 140HP
- SOHC i-VTEC (ECO Version)
- Redline: 6800 rpm

R18Z1

Found in:
- 2012–2015 Honda Civic (FB2, FG3)
- 2016–2020 Honda Civic (FC6, FK5)
  - Displacement: 1.8 L; 109.8 cu in (1,799 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.6:1 (performance benefits from higher octane fuel)
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 145 PS (107 kW; 143 hp) at 6,500 rpm
  - Torque: 17.8 kg⋅m (175 N⋅m; 129 lb⋅ft) 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 low power cam profile by default.

R18Z4

Found in:
- 2012-2016 – Honda Civic (European-market FK2)
  - Displacement: 1.8 L; 109.7 cu in (1,798 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 145 PS (107 kW; 143 hp) at 6,500 rpm
  - Torque: 17.8 kg⋅m (175 N⋅m; 129 lb⋅ft) 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: 1.8 L; 109.8 cu in (1,799 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 141 PS (104 kW; 139 hp) at 6,500 rpm
  - Torque: 17.7 kg⋅m (174 N⋅m; 128 lb⋅ft) at 4,300 rpm

R18Z9

Found in:
- 2016 – Honda HR-V
  - Displacement: 1.8 L; 109.8 cu in (1,799 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 143 PS (105 kW; 141 hp) at 6,500 rpm
  - Torque: 17.7 kg⋅m (174 N⋅m; 128 lb⋅ft) at 4,300 rpm

R18ZF

Found in:
- 2014 – Honda HR-V (Thailand)^[1]
  - Displacement: 1.8 L; 109.8 cu in (1,799 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 87.3 mm (3.19 in × 3.44 in)
  - Power: 143 PS (105 kW; 141 hp) at 6,500 rpm
  - Torque: 17.5 kg⋅m (172 N⋅m; 127 lb⋅ft) at 4,300 rpm

R20

R20A1

Found in:
- 2007–2011 Honda CR-V (RE1, RE2)
- 2008 – Honda Stream (RSZ)
- 2013-2015 Acura ILX (DE1)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 152 PS (112 kW; 150 bhp) at 6,200 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) 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: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 152 PS (112 kW; 150 bhp) at 6,200 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) 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: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.5:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 157 PS (115 kW; 155 bhp) at 6,300 rpm
  - Torque: 19.2 kg⋅m (188 N⋅m; 139 lb⋅ft) at 4,300 rpm

R20A5

Found in:
- 2012–2015 Honda Civic (Southeast Asian FB3)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 157 PS (115 kW; 155 bhp) at 6,500 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) at 4,300 rpm

R20A6

Found in:
- 2012-2016 – Honda CR-V (RM1, RM2)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 157 PS (115 kW; 155 bhp) at 6,500 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) at 4,300 rpm

R20A9

Found in:
- 2012-2016 – Honda CR-V (RE6)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 157 PS (115 kW; 155 bhp) at 6,500 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) at 4,300 rpm

R20Z1

Found in:
- 2012–2015 Honda Civic (FB3)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - SOHC iVTEC (Chain driven cam)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 155 PS (114 kW; 153 bhp) at 6,500 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) at 4,300 rpm

R20Z2/R20Z3

Found in:
- 2013–2017 Honda Accord (CR1)
  - Displacement: 2.0 L; 121.9 cu in (1,997 cc)
  - Compression: 10.6:1
  - Bore & stroke: 81 mm × 96.9 mm (3.19 in × 3.81 in)
  - Power: 155 PS (114 kW; 153 bhp) at 6,500 rpm
  - Torque: 19.4 kg⋅m (190 N⋅m; 140 lb⋅ft) a

LF (R20-based hybrid engine)

LFA1 (i-VTEC + Sport Hybrid i-MMD)

This version includes i-MMD ("Intelligent Multi Mode Drive").

DOHC 16 valve
- Displacement: 2.0 L; 121.6 cu in (1,993 cc)
- Bore x Stroke: 81 mm × 96.7 mm (3.19 in × 3.81 in)
- Power (Engine): 145 PS (107 kW; 143 hp) / 6,200 rpm
- Torque (Engine): 175 N⋅m (129 lb⋅ft) / 3,500 rpm
- Power (Motor): 184 PS (135 kW; 181 hp) / 5,000-6,000 rpm
- Torque (Motor): 315 N⋅m (232 lb⋅ft) / 0–2,000 rpm
- Power (Combined): 215 PS (158 kW; 212 hp) / 6,200 rpm
Honda Odyssey Hybrid/e:HEV (Japan, RC4)^[2]
Honda Stepwgn Hybrid/e:HEV (Japan, RP5)^[3]

LFB1 (i-VTEC + Sport Hybrid i-MMD)

This version includes i-MMD ("Intelligent Multi Mode Drive").

DOHC 16 valve
- Displacement: 2.0 L; 121.6 cu in (1,993 cc)
- Bore x Stroke: 81 mm × 96.7 mm (3.19 in × 3.81 in)
- Power (Engine): 145 PS (107 kW; 143 hp) / 6,200 rpm
- Torque (Engine): 175 N⋅m (129 lb⋅ft) / 3,500 rpm
- Power (Motor): 184 PS (135 kW; 181 hp) / 5,000-6,000 rpm
- Torque (Motor): 315 N⋅m (232 lb⋅ft) / 0–2,000 rpm
- Power (Combined): 215 PS (158 kW; 212 hp) / 6,200 rpm
Honda Accord Hybrid (Thailand, CV3)^[4]
Honda Odyssey e:HEV Absolute (International, RC4)

LFB-13 (i-VTEC + Sport Hybrid i-MMD, e:PHEV)

This version includes i-MMD ("Intelligent Multi Mode Drive").

DOHC 16 valve
- Displacement: 2.0 L; 121.6 cu in (1,993 cc)
- Bore x Stroke: 81 mm × 96.7 mm (3.19 in × 3.81 in)
- Power (Engine): 145 PS (107 kW; 143 hp) / 6,200 rpm
- Torque (Engine): 175 N⋅m (129 lb⋅ft) / 3,500 rpm
- Power (Motor): 184 PS (135 kW; 181 hp) / 5,000-6,000 rpm
- Torque (Motor): 315 N⋅m (232 lb⋅ft) / 0–2,000 rpm
- Power (Combined): 215 PS (158 kW; 212 hp) / 6,200 rpm
Honda CR-V Sport Hybrid e+ (China)

LFB-H4 (i-VTEC + Sport Hybrid i-MMD)

This version includes i-MMD ("Intelligent Multi Mode Drive").

DOHC 16 valve
- Displacement: 2.0 L; 121.6 cu in (1,993 cc)
- Bore x Stroke: 81 mm × 96.7 mm (3.19 in × 3.81 in)
- Power (Engine): 145 PS (107 kW; 143 hp) / 6,200 rpm
- Torque (Engine): 175 N⋅m (129 lb⋅ft) / 3,500 rpm
- Power (Motor): 184 PS (135 kW; 181 hp) / 5,000–6,000 rpm
- Torque (Motor): 315 N⋅m (232 lb⋅ft) / 0–2,000 rpm
- Power (Combined): 215 PS (158 kW; 212 hp) / 6,200 rpm
Honda Accord Hybrid/e:HEV (Japan, CV3)^[5]
Honda CR-V Hybrid/e:HEV (Japan, RT5–RT6)^[6]
Honda Odyssey Hybrid/e:HEV (Japan, RC4)

LFC-H4

DOHC 16 valve
- Displacement: 2.0 L; 121.6 cu in (1,993 cc)
- Bore x Stroke: 81 mm × 96.7 mm (3.19 in × 3.81 in)
- Power (Engine): 141 PS (104 kW; 139 hp) / 6,000 rpm
- Torque (Engine): 182 N⋅m (134 lb⋅ft) / 4,500 rpm
- Power (Motor): 184 PS (135 kW; 181 hp) / 5,000–6,000 rpm
- Torque (Motor): 315 N⋅m (232 lb⋅ft) / 0–2,000 rpm
Honda Civic e:HEV (Japan/Europe, FL4/Thailand, FE4)
Honda ZR-V e:HEV (Australia, RZ4/6)

References

^ Car Thailand ^{[dead link]}
^ "Odyssey Spec List" (PDF). Honda (Japan) (in Japanese).
^ "Stepwgn Spec List" (PDF). Honda (Japan) (in Japanese).
^ "ECO sticker - Honda Accord Hybrid TECH". ECO sticker - The Office of Industrial Economics, Ministry of Industry Thailand (in Thai). Retrieved 18 January 2020.
^ "Accord Spec List" (PDF). Honda (Japan) (in Japanese). Retrieved 26 August 2020.
^ "CR-V Spec List" (PDF). Honda (Japan) (in Japanese). Retrieved 26 August 2020.

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 Motor Company

Divisions and
subsidiaries

Joint ventures
and shareholdings

Astra Honda Motor (50%)
Dongfeng Honda (50%)
GE Honda Aero Engines (50%)
GAC Honda (50%)
- Everus
Hitachi Astemo (33.4%)
- Keihin
- Nissin
- Showa
Honda China (65%)
Honda Prospect Motor (51%)
Sony Honda Mobility (50%)

Automobiles

Cars	Accord/Inspire Amaze Brio City/Ballade Civic Civic Si Civic Type R Integra Crider/Envix Fit/Jazz/Life
Pickup trucks	Ridgeline
Crossovers/SUVs	Avancier/UR-V BR-V CR-V/Breeze e:NP2/e:NS2 Elevate/WR-V HR-V/Vezel/XR-V e:NS1/e:NP1/e:Ny1 Passport Pilot Prologue WR-V Ye P7/Ye S7 ZR-V/HR-V
Vans	Freed Mobilio Odyssey/Elysion Odyssey (North America) Stepwgn
Kei cars	N-Box N-One N-Van N-WGN
Historic and discontinued	1300 Airwave Ascot Ballade Beat Capa City/Jazz (AA) Clarity CR-X CR-X del Sol CR-Z Crossroad Crosstour Concerto Domani e Element EV Plus Fit Aria Fit Shuttle/Shuttle FR-V/Edix Gienia Grace Greiz Horizon Insight Integra Jade LaGreat Legend Life Life Dunk Logo Mobilio Spike N360/N600 NSX Orthia Partner Prelude Quint Rafaga S500 S600 S660 S800 S2000 S-MX Spirior Stream T360/T500 That's Today Torneo Tourmaster Vamos/Vamos Hobio Z Zest
Racing	Curtiss Special R800 R1300 RA270 RA271 RA272 RA273 RA300 RA301 RA302 RC100 RA099 RA106 RA107 RA108 Spirit 201 201C Williams FW09 FW09B FW10 FW11 FW11B Lotus 99T 100T McLaren MP4/4 MP4/5 MP4/5B MP4/6 MP4/6B MP4/7A MP4-30 MP4-31 MCL32 Tyrrell 020 BAR 002 003 004 005 006 007 Jordan EJ11 EJ12 Super Aguri SA05 SA06 SA07 SA08 Toro Rosso STR13 STR14 Red Bull Racing RB15 RB16 RB16B AlphaTauri AT01 AT02 NSX GT2 NSX GT500 HSV-010 GT NSX Concept-GT NSX-GT NSX-GT "Type S" Civic Type R-GT NSX GT3 Acura ARX-01 Acura ARX-02a HPD ARX-03 HPD ARX-04b Acura ARX-05 Acura ARX-06

Concept

Bikes

Motorcycles	CB series CBF series CBR series CG125 CJ series CM/CMX series CR series CRF series CTX series CX series DN-01 Fury GL series NC700 series NR series NSR series RC series ST series VF/VFR series VT series VTX series XR/XL series XRE300 Transalp Africa Twin Deauville Bros/HawkGT NX250 Pacific Coast TL Series (Reflex) Valkyrie X4
Scooters	Activa Aero Big Ruckus Dio Elite EM1 Express Helix Juno CHF50 Motocompo NH series PCX Reflex Ruckus Sparta Spree Ruckus/Zoomer Silver Wing Vision
Other	Ape CT series Cub F Cub series Gyro Integra NM4 Motra P50 PA50 PC50 ST series/Dax Z series