Editing Straight-four engine (section)

=== Displacement ===
Petrol straight-four engines used in modern production cars typically have a displacement of {{convert|1.3|-|2.5|L|cuin|0|abbr=on}}, but larger engines have been used in the past, for example the 1927–1931 [[Bentley 4½ Litre]].

Diesel engines have been produced in larger displacements, such as a 3.2&nbsp;L turbocharged Mitsubishi engine (used the Pajero/Shogun/Montero SUV) and a 3.0&nbsp;L Toyota engine. European and Asian trucks with a [[gross vehicle weight rating]] between 7.5 and 18 tonnes commonly use inline four-cylinder diesel engines with displacements around 5&nbsp;litres.<ref>{{cite web |url=http://www.man-engines.com/datapool/mediapool/800/D0834_LKW_dt.pdf |title=4-Zylinder Reihenmotor für Nutzfahrzeuge. |access-date=2011-08-01 |url-status=dead |archive-url=https://web.archive.org/web/20110714024640/http://www.man-engines.com/datapool/mediapool/800/D0834_LKW_dt.pdf |archive-date=2011-07-14 }}</ref><ref>{{cite web |url=http://www.mantruckandbus.com/en/Products_and_solutions/MAN_Lkw/TGL/TGL.jsp |title=MAN Truck & Bus - TGL |access-date=2011-05-09 |url-status=dead |archive-url=https://web.archive.org/web/20110523132506/http://www.mantruckandbus.com/en/Products_and_solutions/MAN_Lkw/TGL/TGL.jsp |archive-date=2011-05-23 }}</ref><ref>{{cite web |url=http://www.vario-mobil.com/welcome%20to%20variomobil.html |title=VARIOmobil - Welcome to a lap of luxury coaches - recreation vehicles - motor homes |access-date=2011-05-09 |url-status=dead |archive-url=https://web.archive.org/web/20110827160415/http://www.vario-mobil.com/welcome%20to%20variomobil.html |archive-date=2011-08-27 }}</ref><ref>{{cite web |url=http://www.isuzucv.com/engines/4h_index.html |title=Isuzu Commercial Vehicles - Low Cab Forward Trucks - Commercial Vehicles - 4HK1-TC 5.2L Diesel Engine |access-date=2010-12-14 |url-status=dead |archive-url=https://web.archive.org/web/20101224200033/http://www.isuzucv.com/engines/4h_index.html |archive-date=2010-12-24 }}</ref><ref>{{cite web |url=http://www.isuzutruck.co.uk/downloads/specsheets/fseries/f110.210%20easyshift.pdf |title=Euro 4 'Forward' F11O.21O |access-date=2010-12-14 |url-status=dead |archive-url=https://web.archive.org/web/20101126070600/http://isuzutruck.co.uk/downloads/specsheets/fseries/f110.210%20easyshift.pdf |archive-date=2010-11-26 }}</ref><ref>{{cite web|url=http://www.hino-global.com/products/diesel_engines/index.html |title=Diesel Engines &#124; Products |publisher=Hino Global |access-date=2017-05-23}}</ref><ref>{{cite web |url=http://www.hino-global.com/pdf/catalog/Hino_500S_Catalog_LR.pdf |title=Hino 500 Series |access-date=2010-12-14 |url-status=dead |archive-url=https://web.archive.org/web/20101214123029/http://www.hino-global.com/pdf/catalog/Hino_500S_Catalog_LR.pdf |archive-date=2010-12-14 }}</ref> Larger displacements are found in locomotive, marine and stationary engines.

Displacement can also be very small, as found in [[kei car]]s sold in Japan. Several of these engines had four cylinders at a time when regulations dictated a maximum displacement of 550&nbsp;cc; the maximum size is currently at 660&nbsp;cc.