{{Infobox automobile engine | name = BMW S68 engine | image = S68 XM.jpg | caption = S68 in [[BMW XM]] (G09) | manufacturer = [[BMW]] | production = 2022–present | related = | displacement = {{convert|4395|cc|L|1|order=flip|abbr=on}} | configuration = 90° [[V8 engine|V8]] | bore = {{convert|89|mm|2|abbr=on}} | stroke = {{convert|88.3|mm|2|abbr=on}} | valvetrain = [[DOHC]] w/ [[Variable valve timing|VVT]] | block = [[Aluminium]] | head = Aluminium | turbocharger = [[Twin-turbo]] | fueltype = [[Petrol engine|Petrol]] | predecessor = [[BMW S63]] | successor = }}
The '''BMW S68''' is a [[twin-turbo]]charged [[V8 engine]] produced by [[BMW]]. Its first use was in the 2023 revised [[BMW X7]] as the M60i.<ref name="mulach-2022-04">{{cite web|author=Jordan Mulach |url=https://www.whichcar.com.au/news/bmw-debuts-all-new-4-4-litre-twin-turbo-s68-v8 |title=BMW debuts all-new 4.4-litre twin-turbo S68 V8 |work=whichcar.com.au | language=en |date=2022-04-15 |accessdate=2022-06-28}}</ref> A few weeks after its presentation, BMW showed a study of the [[BMW XM|XM]] with a more powerful version of the engine.<ref name="autozeitung-2022-05">{{cite web|author=Sven Kötter|url=https://www.autozeitung.de/neuer-bmw-xm-201705.html |title=Neuer BMW XM (2022): Erste Testfahrt |work=autozeitung.de |date=2022-05-16 |accessdate=2022-06-28}}</ref><ref name="auto-mot-2023">{{cite web|author=Thomas Hellmanzik |url=https://www.auto-motor-und-sport.de/fahrbericht/bmw-xm-2023-update/ |title=BMW XM (2023): 2,7 Tonnen und trotzdem M? |work=auto-motor-und-sport.de |date=2022-05-19 |accessdate=2022-06-28}}</ref> In addition, the basic version is also used in [[BMW 7 Series (G70)|BMW 760i]],<ref>{{cite web|author=Benny |url=https://www.bimmertoday.de/2022/04/20/bmw-7er-g70-motoren-daten-von-740d-m760e-bis-i7-m70/#image-3 |title=BMW 7er G70: Motoren & Daten von 740d & M760e bis i7 M70 |work=bimmertoday.de |date=2022-04-20 |accessdate=2022-06-28}}</ref> [[BMW X5 (G05)|BMW X5 M60i]], and [[BMW X6|BMW X6 M60i]].<ref>{{Cite web |title=The 2024 BMW X5 and X6. |url=https://www.press.bmwgroup.com/usa/article/detail/T0408460EN_US/the-2024-bmw-x5-and-x6?language=en_US |access-date=2023-06-07 |website=www.press.bmwgroup.com}}</ref>
==Design== The S68 has the same piston stroke of {{cvt|88.3|mm|abbr=on}} and displacement as its S63 predecessor, but the compression ratio of 10.5:1 corresponds to the higher compressed predecessor variants.<ref name="techdaten">{{cite web |url=https://www.press.bmwgroup.com/deutschland/article/attachment/T0378353DE/555258 |title=Der neue BMW X7. Seite 3 |work=press.bmwgroup.com |date= |accessdate=2022-06-28|format=PDF}}</ref> It has one turbocharger per cylinder bank and both turbochargers are placed in the middle of the cylinder banks in a hot-vee design taken from the previous S63 variant; there is only one exhaust manifold. The S68 is the only current production V8 engine offered with a cross-pattern exhaust manifold for improved turbo charger pressure by combining exhaust pulses which comes at an expense of sound alternation, making the sound closer to a 180 degree configuration V8. The engine oil is cooled by an external cooler, and a newly developed oil pump is used for the oil circuit. The engine is now only offered as a 48-volt mild hybrid powerplant [[mild hybrid]] system, it has a {{cvt|9|kW|abbr=on}} electric motor with a torque of {{cvt|200|Nm|abbr=on}}; unlike the previous mild hybrid systems from BMW, this is installed within the transmission.<ref name="mulach-2022-04"/> The electric motor is also used for hot starts, while cold starts are performed by a standard 12 volt starter similar to most other engines. The battery required for this has a 90 Ah capacity. The 48-volt battery found in the X7 M60i, XM, and the 760i models has a capacity of 20 Ah.<ref name="techdaten"/><ref name="techripon">{{cite web |author=Jeff M |url=https://www.technicalripon.com/bmw-s68-twin-turbo-v8-an-m-division-engine-for-the-masses/ |title=BMW S68 Twin-Turbo V8 - An M-Division engine for the masses |work=technicalripon.com |language=en |date=2022-04-15 |accessdate=2022-06-28 |archive-date=2022-04-15 |archive-url=https://web.archive.org/web/20220415123028/https://www.technicalripon.com/bmw-s68-twin-turbo-v8-an-m-division-engine-for-the-masses/ |url-status=dead }}</ref> The variable camshaft control ([[VANOS]]) is now electrical and no longer hydraulic.<ref name= "techripon"/> The S68 currently meets the [[European emission standards|Euro 6d emissions standard]],<ref name="mulach-2022-04"/><ref name="techdaten"/> but should also be able to achieve the stricter Euro 7 standard, which is planned for 2025.<ref>{{cite web|title=Was Euro 7 für die Zukunft der Verbrennungsmotoren bedeutet|periodical=Springerprofessional.de|publisher=|url=https://www.springerprofessional.de/verbrennungsmotor/emissionen/was-euro-7-fuer-die-zukunft-der-verbrennungsmotoren-bedeutet/19009238|url-status=|format=|access-date=2022-06-29|archive-url=|archive-date=|last=Christiane Köllner|date=2022-01-10|language=|pages=|quote=}}{{Dead link|date=September 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref name= "techripon"/>
The electric motor in the S68 has a torque of {{cvt|200|Nm|abbr=on}}.<ref name="autozeitung-2022-05"/><ref name="auto-mot-2023"/> Maximum revs are 7200 rpm.<ref>{{cite web|url=https://www.carsales.com.au/editorial/details/bmw-xm-2022-review-international-135654/ |title=BMW XM 2022 Review – International |work=carsales.com.au | language=en |date=2022-05-18 |accessdate=2022-06-28}}</ref>
==Applications== * 2022– [[BMW_7_Series_(G70)|G70 760i xDrive]] * 2022– [[BMW XM|G09 XM]] * 2023– [[BMW_X5_(G05)|G05 X5 M60i]] * 2023– [[BMW_X6_(G06)|G06 X6 M60i]] * 2024– [[BMW_X5_(G05)|F95 X5 M Competition]] * 2024– [[BMW_X6_(G06)|F96 X6 M Competition]] * 2023– [[BMW_X7|G07 X7 M60i]] * 2023– [[BMW_X7|G07 Alpina XB7]] * 2024– [[BMW_M5#G90_M5_(2024)|G90 M5]] * 2024– [[BMW_M5#G99_M5_(2024)|G99 M5]] * 2024– [[Range Rover (L460)]] * 2024– [[Range_Rover_Sport (L461)#Third_generation_(L461;_2022–present)|Land Rover Range Rover Sport (L461)]] * 2024– [[Range Rover Sport (L461)#L461|Land Rover Range Rover Sport SV]] * 2024– [[Land Rover Defender (L663)#Defender OCTA|Land Rover Defender OCTA]]
==See also== * [[List of BMW engines]] {{clear right}}
==References== {{Reflist|30em}}
{{BMW automotive petrol engines: 2000s to 2010s}}
[[Category:BMW engines|S68]] [[Category:Land Rover engines]] [[Category:V8 engines]] [[Category:Gasoline engines by model]] [[Category:2020s automobile engines]]