Editing Petrol engine (section)

{{short description|Internal combustion engine designed to run on gasoline}}
[[File:American Motors AMC modern era inline six on stand at Rambler Ranch.jpg|thumb|right|A circa-1970 [[AMC_straight-6_engine#232|AMC 232]] automotive engine]]

A '''petrol engine''' ('''gasoline engine''' in American and Canadian English) is an [[internal combustion engine]] designed to run on [[petrol]] (gasoline). Petrol engines can often be adapted to also run on fuels such as [[Autogas|liquefied petroleum gas]] and [[Common ethanol fuel mixtures|ethanol blends]] (such as ''[[E10 petrol|E10]]'' and ''[[Common ethanol fuel mixtures#E85|E85]]''). They may be designed to run on petrol with a higher [[octane rating]], as sold at [[petrol stations]].

Most petrol engines use [[Spark-ignition engine|spark ignition]], unlike [[diesel engine]]s which run on [[diesel fuel]] and typically use compression ignition. Another key difference to diesel engines is that petrol engines typically have a lower [[compression ratio]].<ref>{{Cite web |title=How do car engines work? |url=https://www.kia.com/dm/discover-kia/ask/how-do-car-engines-work.html#:~:text=As%20a%20result,%20the%20gasoline,of%20the%20gasoline%20engine%20operate. |access-date=2024-11-11 |website=Kia British Dominica |language=en-DM}}</ref><ref>{{Cite web |title=Alternative Fuels Data Center: How Do Diesel Vehicles Work? |url=https://afdc.energy.gov/vehicles/how-do-diesel-cars-work |access-date=2024-11-11 |website= |language=en}}</ref><ref>{{Cite web |title=Unterschied zwischen Diesel- und Benzinmotoren |trans-title=The difference between diesel and gasoline engines |url=https://www.autodoc.de/info/diesel-oder-benzinmotor-was-ist-der-unterschied |access-date=2024-11-11}}</ref>