Editing Toyota R engine (section)

===20R===
The 2-valve [[SOHC]] {{convert|2190|cc|L|1|abbr=on|order=flip}} '''20R''' was produced from 1975 through 1980. Cylinder bore and stroke was {{convert|88.5x89|mm|in|abbr=on}}. Aluminum alloy heads were used.

Initial output was {{convert|72|kW|hp PS|0|abbr=on}} at 4800&nbsp;rpm ({{convert|90|hp|kW PS|0|abbr=on}} in [[California]]) and {{convert|162|Nm|lbft|0|abbr=on}} at 2,800&nbsp;rpm. Power was down slightly from 1978 through 1979 at {{convert|71|kW|hp PS|0|abbr=on}} at 4800&nbsp;rpm and {{convert|165|Nm|lbft|0|abbr=on}} at 2400&nbsp;rpm. The final version, from 1979 through 1980, was down again at {{convert|67|kW|hp PS|0|abbr=on}} at 4800&nbsp;rpm (still at {{convert|95|hp|kW PS|0|abbr=on}} in Canada) and {{convert|165|Nm|lbft|0|abbr=on}} at 2400&nbsp;rpm.

The 20R and subsequent models featured important design changes relative to the earlier SOHC R-series engines.  The head was changed from a reverse-flow to a cross-flow type with hemispherical combustion chambers and shorter valve rockers.  The timing chain was strengthened.  The lower block bearings were strengthened against wear, safeguarding oil pressure, and the stroke was lengthened.  The changes increased torque substantially and shifted peak power and torque towards the lower speed range.  The later R series engines did much to establish Toyota's reputation for reliability, which had previously been indifferent at best.

Applications:
* 1975–1980 [[Toyota Hilux]]
* 1975–1980 [[Toyota Celica]] (U.S. Version)
* 1975–1980 [[Toyota Corona]] (U.S. Version)
* [[Toyota Stout (K110)|Toyota Stout]] (RK110/111)
* [[Toyota Coaster]] (RB11)<ref name=Catvol25>{{cite journal | title = Catalogue vol. 25 | ref = JAMA25 | journal = 自動車ガイドブック [Japanese Motor Vehicles Guide Book] | language = Japanese | volume = 25  | date = 1978-10-10 | publisher = [[Japan Automobile Manufacturers Association]] | location = Japan | page = 295 | id = 0053-780025-3400 }}</ref>

{{anchor|21R|21R-C}}