Honda R engine

The Honda R series inline four cylinder engine is new for the 2006 Honda Civic (Non-Si). It is fuel injected, has an aluminum-alloy cylinder block and cylinder head, is a SOHC 16 valve design (4 valves per cylinder), utilizes Honda's i-VTEC system, and produces 138 (JDM) and 140 (USDM) hp (103 (JDM) and 104 (USDM) kW) @ 6300 rpm and 128 lbf·ft (174 N·m) @4300 rpm SAE net (torque), with the redline at 6800 rpm. The R series is undersquare with a bore and stroke of 81 x 87.3 mm (stroke ratio of 0.93); it has a high 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 technologies to improve economy. Piston rings are given an ion plating, weight is reduced with plastic and aluminum parts and variable length intake manifolds that maintain ram air at a wide rpm range. The automatic transmission model is rated at CARB ULEV-2 (Ultra Low Emissions Vehicle) with 25/36 city/highway mpg (U.S. gallons) . It also uses the same computer (ECU) controlled coil-on-plug ignition as the Honda K-series engines; it has no distributor. The R Series engine's OEM service manual is available at [http://www.helminc.com/helm/product2.asp?sku=61SNA03&Style=2HDX04HSEQ85VCP&mscsid=CEX46G3DKPT78NC8DUCT1JMC226D3402 HELM INC.]

R16

R16A

*Found in:
** 2007- Honda Civic (Singapore Local Market FD4)
*** Displacement: 1595 cc
*** Compression: 10.5:1
*** Bore & stroke: 81.0 x 77.4 mm
*** Power: 123 bhp (125 PS, 93 kW) @ 6200 rpm Net horsepower
*** Torque: 15.6 kgf·m (151 N·m, 113 lbf·ft) @ 4200 rpm Net horsepower

R18

R18A1

*Found in:
** 2006- Honda Civic (JDM FD1, USDM FA1, USDM FG1)
*** Displacement: 1799 cc
*** Compression: 10.5:1
*** Bore & stroke: 81.0 x 87.3 mm
*** Power: 138 bhp (140 PS, 103 kW) @ 6300 rpm (JDM Spec)
*** Torque: 17.7 kgf·m (174 N·m, 128 lbf·ft) @ 4300 rpm

R18A2

*Found in:
** 2007- Honda Civic (EDM FN1, EDM FK2)
** 2008- Honda CRV
*** Displacement: 1799 cc
*** Compression: 10.5:1
*** Bore & stroke: 81.0 x 87.3 mm
*** Power: 138 bhp (140 PS, 103 kW) @ 6300 rpm
*** Torque: 17.7 kgf·m (174 N·m, 128 lbf·ft) @ 4300 rpm

R20

R20A1

*Found in:
** 2007- Honda CRV (RE2)
*** Displacement: 1997 cc
*** Compression: 10.5:1
*** Bore & stroke: 81.0 x 96.9 mm
*** Power: 148 bhp (150 PS, 110 kW) @ 6200 rpm
*** Torque: 19.4 kgf·m (190 N·m, 140 lbf·ft) @ 4200 rpm
** 2008- Honda Accord (CP3)

External links

* [http://paultan.org/archives/2006/03/13/2006-honda-civic-18-sohc-i-vtec-engine/ Technical article on the Honda R-series R18A1]
* [http://asia.vtec.net/Engines/R18A/index.html Honda's New R18A Engine "(Temple of VTEC Asia)"]
* [http://asia.vtec.net/Engines/RiVTEC/index.html SOHC i-VTEC on the R18A "(Temple of VTEC Asia)"]
* [http://asia.vtec.net/hardcore/Civic18S/index.html Dyno Results the new 8G Asian Civic 1.8S "(Temple of VTEC Asia)"]
* [http://world.honda.com/news/2005/4050705_a.html Honda Worldwide, Honda Develops New 1.8l i-VTEC Engine]
* [http://world.honda.com/HDTV/news/2005-4050705a/ Honda Worldwide, New 1.8l i-VTEC Engine (Video)]
* [http://paultan.org/archives/2008/07/17/review-2008-honda-accord-20-vti/ 2008 Honda Accord 2.0 VTi] (R20A3)

References

ee also

*Honda Engines