BMW M30#M30B30

{{Infobox automobile engine

|name=BMW M30 engine

|image=BMW E28 motor.jpg

|production=1968–1995

|configuration= Straight-6

|valvetrain= SOHC

|block= Cast iron

|head= Aluminium

|fueltype=Petrol

|displacement={{ubl

| {{cvt|2494|cc|CID|0}}

| {{cvt|2788|cc|CID|0}}

| {{cvt|2986|cc|CID|0}}

| {{cvt|3210|cc|CID|0}}

| {{cvt|3295|cc|CID|0}}

| {{cvt|3430|cc|CID|0}}

}}

|bore = {{ubl

| {{cvt|86.0|mm|in|1}}

| {{cvt|89.0|mm|in|1}}

| {{cvt|92.0|mm|in|1}}

}}

|stroke = {{ubl

| {{cvt|71.6|mm|in|1}}

| {{cvt|80.0|mm|in|1}}

| {{cvt|86.0|mm|in|1}}

| {{cvt|88.0|mm|in|1}}

}}

|predecessor=BMW M20

|successor=BMW M50

}}

The BMW M30 is a SOHC straight-six petrol engine which was produced from 1968 to 1995. With a production run of 27 years, it is BMW's longest produced engine and was used in many car models.

The first models to use the M30 engine were the BMW 2500 and 2800 sedans. The initial M30 models were produced in displacements of {{convert|2494|cc|L|1|disp=flip}} and {{convert|2788|cc|L|1|disp=flip}}. Larger displacement versions were introduced over time, with the largest version being {{convert|3430|cc|cuin|1|abbr=on}}, which was sometimes badged as "3.5 litres".{{cite web|title=Bmw Engine and Powerplant Identification Codes|url=http://www.rtsauto.com/bmw-engine-and-powerplant-identification-codes/|website=www.rtsauto.com|date=8 July 2010 |access-date=8 September 2017}} As per the BMW M10 four-cylinder engine from which the M30 was developed, the M30 has an iron block, an aluminium head and an overhead camshaft with two valves per cylinder.

The engine was given the nicknames of 'Big Six' and 'Senior Six', following the introduction of the smaller BMW M20 straight-six engine in the late 1970s. The M30 was produced alongside the M20 throughout the M20's production, and prior to the introduction of the BMW M70 V12 engine in 1987, the M30 was BMW's most powerful and largest regular production engine.

Following the introduction of the BMW M50 engine in 1990, the M30 began to be phased out.

Ward's have rated the M30 as one of the "Top Engines of the 20th Century".{{cite web|title=Ward's 10 Best Engines include 2 BMW sixes|url=http://www.pacemotors.com.au/ArticleView.asp?ArticleID=4|website=www.pacemotors.com.au|archive-url=https://web.archive.org/web/20070522185127/http://www.pacemotors.com.au/ArticleView.asp?ArticleID=4|archive-date=22 May 2007}}

Design

The M30 was originally developed in the late 1960s, loosely based on the BMW M10 four-cylinder engine first used in the BMW New Class sedans and coupes.{{citation | ref = AU71 | journal = Auto-Universum 1971 | title = BMW 2500/2800 | last = Becker | first = Clauspeter | editor-first = Arthur | editor-last = Logoz | date = 1971 | publisher = Verlag Internationale Automobil-Parade AG | location = Zürich, Switzerland | volume = XIV | language = de }}{{refpage|page=70}} Initially, the engine code was "M06" and the "M68", until all versions began to use the "M30" prefix in 1981.{{cite web |title=BMW M68 car engine 2.5 litre |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3940974 |website=www.bmw-grouparchiv.de |access-date=4 April 2021}}{{cite web |title=Bow Down To The E28 M5; Performance Cars Would Be Nothing Without It |url=https://www.carthrottle.com/post/bow-down-to-the-bmw-e28-m5-the-performance-car-world-would-be-nothing-without-it/ |website=www.carthrottle.com |date=18 May 2015 |access-date=1 December 2018 |language=en}}{{cite web |title=The Beginning of a Legacy – A BMW Motor Evolution |url=http://drive4corners.com/beginning-legacy-bmw-motor-evolution/ |website=www.drive4corners.com |date=5 November 2014 |access-date=1 December 2018}}

Common features between the M10 and M30 include a profile lowering 30-degree slant to the right, a crossflow cylinder head, and chain-driven camshaft with rocker arm valve actuation.{{cite book | last = Cranswick | first = Marc | title = The BMW 5 series and X5: a history of production cars and tuner specials, 1972-2008 | date = 2010 | publisher = McFarland | location = Jefferson, NC | isbn = 978-0786443512}} Further similarities include a cast-iron block with an aluminium head and a forged crankshaft. The first two M30 engines introduced were the {{cvt|2494|cc|L|1|disp=flip}} and the {{cvt|2788|cc|L|1|disp=flip}} versions, which both used an {{convert|86|mm|in|2|abbr=on}} bore.

M30B35LE/M90 engine

The M30B35LE engine, also called the M90, was used in several models from 1979-1982. It combines the block from the motorsports BMW M88 DOHC engine with the M30's SOHC cylinder head.

Versions

class="wikitable sortable" style="text-align: center;" !Version!!Displacement!!Power output!!Torque!!Year
M30B25V	rowspan=2\|{{convert\|2494\|cc\|cuin\|1\|abbr=on}}	rowspan=2\|{{cvt\|150\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|211\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1968
M30B25	{{convert\|215\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1981
M30B28V	rowspan=2\|{{convert\|2788\|cc\|cuin\|1\|abbr=on}}	{{cvt\|170\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|235\|Nm\|lbft\|0\|abbr=on}} at 3,700	1968
M30B28	{{convert\|135\|kW\|bhp\|0\|abbr=on}} at 5,800 rpm	{{convert\|240\|Nm\|lbft\|0\|abbr=on}} at 4,200 rpm	1977
M30B30V	rowspan=2\|{{convert\|2986\|cc\|cuin\|1\|abbr=on}}	{{cvt\|180\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|255\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1971
M30B30	{{cvt\|200\|PS\|kW PS bhp\|0\|order=out}} at 5,500 rpm	{{convert\|272\|Nm\|lbft\|0\|abbr=on}} at 4,300 rpm	1971
M30B32	{{convert\|3210\|cc\|cuin\|1\|abbr=on}}	{{cvt\|200\|PS\|kW PS bhp\|0\|order=out}} at 5,500 rpm	{{convert\|285\|Nm\|lbft\|0\|abbr=on}} at 4,300 rpm	1976
M30B33V	{{convert\|3295\|cc\|cuin\|1\|abbr=on}}	{{convert\|139\|kW\|bhp\|0\|abbr=on}} at 5,500 rpm	{{convert\|289\|Nm\|lbft\|0\|abbr=on}} at 3,500 rpm	1973
M30B34	rowspan=2\|{{convert\|3430\|cc\|cuin\|1\|abbr=on}}	{{convert\|160\|kW\|bhp\|0\|abbr=on}} at 5,800 rpm	{{convert\|310\|Nm\|lbft\|0\|abbr=on}} at 4,200 rpm	\|1982
M30B35	{{convert\|155\|kW\|bhp\|0\|abbr=on}} at 5,700 rpm	{{convert\|305\|Nm\|lbft\|0\|abbr=on}} at 4,000 rpm	1988

= M30B25V =

File:M30 BMW-Museum IMG20141113 (cropped).jpg]]

File:Bundesarchiv B 145 Bild-F027640-0006, München, BMW Autowerk.jpg

File:Bundesarchiv B 145 Bild-F027640-0009, München, BMW Autowerk.jpg

The first {{convert|2494|cc|cuin|1|abbr=on}} version of the M30 was introduced in the 1968 E3 2500. This version uses dual Solex Zenith 35/40 INAT carburettors, has a compression ratio of 9.0:1 and produces {{convert|110|kW|PS bhp|0|abbr=on}} in most applications.{{cite web |title=BMW Classic - BMW 525 (E12) |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3840530 |website=www.bmw-grouparchiv.de |access-date=14 March 2021}} It has a bore of {{convert|86|mm|2|abbr=on}} and a stroke of {{convert|71.6|mm|2|abbr=on}}.

The M30B25 has previously been called the M06 and M68, prior to BMW retroactively renaming it the M30B25V (V for Vergaser- carburettor in German).{{cite web|title=Easter Special: History of BMW motorsport, inc the factory 959BHP M30|url=http://www.bimmernut.com/forum/5-series-bmw/20836-easter-special-history-bmw-motorsport-inc-factory-959bhp-m30-2.html|website=www.bimmernut.com|archive-url=https://web.archive.org/web/20121126092045/http://www.bimmernut.com/forum/5-series-bmw/20836-easter-special-history-bmw-motorsport-inc-factory-959bhp-m30-2.html|archive-date=26 November 2012}}

Applications:

1968–1977 E3 2500
1974–1975 E9 2.5 CS
1973–1976 E12 525 — {{cvt|145|PS|kW PS hp|0|order=out}}, Solex 4A1 carburettor{{citation needed|date=April 2021}}
1976–1981 E12 525
1977–1979 E23 725{{cite web|title=BMW 7 Series (E23) 1977 - 1986|url=https://www.autoevolution.com/cars/bmw-7-series-e23-1977.html#aeng_bmw-7-series-e23-1977-725-3at-150-hp|website=www.autoevolution.com|access-date=1 September 2017}}{{Verify source|see talk page|date=June 2024}}

= M30B25 =

In 1981, Bosch L-Jetronic electronic fuel injection was added to the {{convert|2494|cc|cuin|1|abbr=on}} version. Peak power remained unchanged at {{convert|110|kW|bhp|0|abbr=on}}, however torque increased slightly to {{convert|215|Nm|lbft|0|abbr=on}}.

Applications:

1981-1987 E28 525i{{cite web|title=1981 BMW E28 525i Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/230/BMW-E28-5-Series-525i.html|website=www.ultimatespecs.com|access-date=1 September 2017}}
1981-1986 E23 725i{{cite web|title=1981 bmw E23 725i Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/1421/BMW-E23-7-Series-725i.html|website=www.ultimatespecs.com|access-date=1 September 2017}}{{cite web|title=1986 BMW 725i (model up to mid-year 1986 for Europe ) specifications|url=http://www.automobile-catalog.com/car/1986/264395/bmw_725i.html|website=www.automobile-catalog.com|access-date=1 September 2017}}

= M30B28V =

In its original form, the carburetted 2.8 used two Solex Zenith "35/40 INAT" carburetors, the compression ratio is 9.0:1 and the engine produces {{cvt|170|PS|kW PS hp|0|order=out}} and {{cvt|24.0|kgm|Nm lbft|0|order=out}}.{{refpage|page=77}} The specifications went on to vary depending on the model year, carburettor and country. The bore is {{convert|86|mm|2|abbr=on}} and the stroke is {{convert|80|mm|2|abbr=on}}.

This version has also been known as the M06 and M68, prior to BMW renaming it the M30B28V.

Applications:

1968-1977 E3 2800 / 2.8L — {{cvt|170|PS|kW PS hp|0|order=out}}{{cite web |title=1975 BMW 2.8 L E3 specifications & stats |url=https://www.carfolio.com/specifications/models/car/?car=153175 |website=www.carfolio.com |access-date=29 December 2018}}{{cite book |last=Oswald |first=Werner |title= Deutsche Autos 1945-1990, Band 4|edition=1|year=2001 |publisher=Motorbuch Verlag |location=Stuttgart |isbn=3-613-02131-5}}
1968-1971 E9 2800 CS — {{convert|125|kW|PS bhp|0|abbr=on}}{{cite web |title=Detailed specs review of 1971 BMW 2800 CS offered up to April 1971 for Europe Australia |url=https://www.automobile-catalog.com/car/1971/78125/bmw_2800_cs.html |website=www.automobile-catalog.com |access-date=14 March 2021}}
1971-1971 E3 Bavaria — {{convert|168|hp|kW|order=flip|abbr=on|0}},{{cite web |title=Detailed specs review of 1971 BMW Bavaria offered since mid-year 1970 for North America U.S. |url=https://www.automobile-catalog.com/car/1971/77870/bmw_bavaria.html |website=www.automobile-catalog.com |access-date=14 March 2021}}{{cite web |title=1971 BMW Bavaria |url=https://www.goodingco.com/vehicle/1971-bmw-bavaria/ |website=www.goodingco.com |access-date=14 March 2021 |language=en}} United States only
1974-1976 E12 528 — {{cvt|165|PS|kW PS hp|0|order=out}} dual Zenith INAT carburettors{{cite book |title=Betriebsanleitung 518, 520, 525, 528, 520i |date=15 January 1975 |publisher=BMW |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3272432 |access-date=29 December 2018}}{{refpage|page=89}}{{cite web|title=1974 BMW E12 5 Series 528 Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/1292/BMW-E12-5-Series-528.html|website=www.ultimatespecs.com|access-date=1 September 2017}}{{cite web|title=1974 BMW 528 (model since mid-year 1974 for Europe Australia ) specifications|url=http://www.automobile-catalog.com/car/1974/170960/bmw_528.html|website=www.automobile-catalog.com|access-date=1 September 2017}}
1976-1978 E12 528 — {{cvt|125|kW|PS bhp|0}}, Solex 4A1 carburettor{{cite book |title=Fahrzeugprospekt 518 520 520i 525 528 |date=January 1977 |publisher=BMW |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3155591 |access-date=29 December 2018}}{{refpage|page=25}}
1977-1979 E23 728 — {{cvt|125|kW|PS bhp|0}}, Solex 4A1 carburettor{{cite web |title=1977 BMW 728 E23 specifications & stats |url=https://www.carfolio.com/specifications/models/car/?car=56067 |website=www.carfolio.com |access-date=29 December 2018}}

= M30B28 =

In 1977, Bosch L-Jetronic electronic fuel injection was added to the {{convert|2788|cc|cuin|1|abbr=on}} version. Power increased to {{convert|135|kW|bhp|0|abbr=on}} and torque increased to {{convert|240|Nm|lbft|0|abbr=on}}.

1977-1978 E12 528i — North America only, {{convert|129|kW|bhp|0|abbr=on}}, 9.0:1 compression ratio
1978-1981 E12 528i — {{cvt|177|PS|kW PS hp|0|order=out}}{{cite web |title=1977 BMW E12 5 Series 528i Technical Specs |url=https://www.ultimatespecs.com/car-specs/BMW/1400/BMW-E12-5-Series-528i.html |website=www.ultimatespecs.com |access-date=9 December 2018 |language=en}}
1979-1986 E23 728i
1979-1987 E24 628CSi
1981-1987 E28 528i{{cite web|title=1981 BMW 528i E28|url=http://www.carfolio.com/specifications/models/car/?car=31713|website=www.carfolio.com}}

= M30B30V =

Based on the M30B28V version with a {{convert|3|mm|in|abbr=on}} larger bore, the M30B30V produces {{cvt|180|PS|kW PS bhp|0|order=out}} and {{convert|255|Nm|lbft|0|abbr=on}},{{cite web|title=1971 BMW 3.0 S (model since April 1971 for Europe Australia ) specifications|url=http://www.automobile-catalog.com/car/1971/77660/bmw_3_0_s.html|website=www.automobile-catalog.com|access-date=1 September 2017}}{{cite web|title=1971 BMW E9 3.0 CS Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/19720/BMW-E9-30-CS.html|website=www.ultimatespecs.com|access-date=1 September 2017}} uses dual Zenith 35/40 INAT carburettors and has a compression ratio of 9.0:1. In United States trim, this engine produced {{cvt|170|hp|kW hp|0|order=out}} at 5800 rpm.{{Cite book | ref = SCimp | title = Standard Catalog of Imported Cars, 1946-1990 | first = James M. | last = Flammang | publisher = Krause Publications, Inc. | location = Iola, WI | pages = 176–177 | date = 1994 | isbn = 0-87341-158-7 }}

Applications:

1971-1975 E9 3.0 CS
1971-1972 E9 3.0 CSL
1971-1974 E3 3.0 S / 3.0 L / Bavaria
1976-1979 E24 630 CS — {{cvt|136|kW|PS bhp|0}}, Pierburg 4A1 carburetor{{cite web|title=1976 BMW 630 CS E24|url=http://www.carfolio.com/specifications/models/car/?car=17567|website=www.carfolio.com|access-date=1 September 2017}}
1977-1979 E23 730 — {{cvt|135|kW|PS bhp|0}}, Solex 4 A 1 carburettor{{cite web|title=BMW 730, 1977 MY E23|url=http://www.carfolio.com/specifications/models/car/?car=253550|website=www.carfolio.com|access-date=1 September 2017}}

= M30B30 =

The fuel injected version of the {{convert|2986|cc|cuin|1|abbr=on}} M30 debuted in 1971 in the E9 3.0 CSi and initially used the Bosch D-Jetronic mechanical fuel injection system.{{cite web|title=The BMW Six Cylinder Guide|url=http://www.autospeed.com/cms/article.html?&title=The-BMW-Six-Cylinder-Guide&A=2948|website=www.autospeed.com|access-date=8 September 2017}} In 1976, the fuel injection system was upgraded to Bosch L-Jetronic electronic fuel injection. The M30B30 produces up to {{cvt|200|PS|kW PS bhp|0|order=out}} and {{cvt|27.7|kgm|Nm lbft|0|order=out}},{{Cite book | title = Quattroruote: Tutte le Auto del Mondo 74/75 | publisher = Editoriale Domus S.p.A | date = 1974 | ref = TAM75 | language = Italian | page = 84 | location = Milano }} depending on the model year and whether a catalytic converter is fitted. The compression ratio is 9.2:1. With catalytic converter, compression ratio is 9:1.

Applications:

1971-1975 E9 3.0 CSi — {{cvt|200|PS|kW PS bhp|0|order=out}}
1972-1973 E9 3.0 CSL — {{cvt|200|PS|kW PS bhp|0|order=out}}
1972-1975 E3 3.0 Si — {{convert|147|kW|bhp|0|abbr=on}}
1975-1978 E12 530i — North America only, {{convert|131|kW|bhp|0|abbr=on}}{{cite web|title=1974 BMW E12 5 Series 530i(USA) Specs|url=https://www.ultimatespecs.com/car-specs/BMW/1293/BMW-E12-5-Series-530i(USA).html|website=www.ultimatespecs.com|access-date=1 September 2017}}
1976-1976 E12 530 MLE — South Africa only, {{convert|147|kW|bhp|0|abbr=on}}{{cite web|title=1976 BMW 530 MLE E12|url=http://www.carfolio.com/specifications/models/car/?car=131868|website=www.carfolio.com|access-date=1 September 2017}}
1977-1978 E24 630CSi — North America only, {{convert|129|kW|bhp|0|abbr=on}}{{cite web|title=1976 BMW 630 CSi E24|url=http://www.carfolio.com/specifications/models/car/?car=14278|website=www.carfolio.com|access-date=1 September 2017}}
1986-1995 E32 730i — {{convert|138|kW|bhp|0|abbr=on}}{{cite web |title=BMW 730i 6-cyl. (E32) |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3843347 |website=bmw-grouparchiv.de |access-date=14 August 2019}}{{cite web |title=1992 7 Series User Manual |url=https://bmw-grouparchiv.de/research/media/4015c3ab-a2c3-40fe-b741-4fd549797a3b/web |website=bmw-grouparchiv.de |access-date=9 December 2018}}
1988-1990 E34 530i — {{convert|138|kW|bhp|0|abbr=on}}

= M30B32 =

Despite having a capacity of {{convert|3210|cc|cuin|1|abbr=on}}, this engine appeared in many cars badged so as to suggest {{convert|3.3|L|cuin|0|abbr=on}} of displacement- such as the 633i, 3.3 Li, and 733i. The compression ratio is 8.8:1. In the E24 633CSi coupe, the M30B32 uses Bosch L-Jetronic electronic fuel injection. The US version used L-Jetronic from 1978 until mid-1981, changing over to Motronic digital fuel injection in June of that year. The 1979 732i is BMW's first use of Bosch's Motronic fuel injection.{{cite web|title=BMW M30 and M102 Six Cylinder Engines|url=http://www.unixnerd.demon.co.uk/m30.html|website=www.unixnerd.demon.co.uk|access-date=1 September 2017|archive-date=21 December 2016|archive-url=https://web.archive.org/web/20161221232350/http://www.unixnerd.demon.co.uk/m30.html|url-status=dead}} The bore is {{convert|89|mm|2|abbr=on}} and the stroke is {{convert|86|mm|2|abbr=on}}.

Applications:

1973-1975 E9 3.0 CSL — {{cvt|206|PS|kW PS hp|0|order=out}}, {{convert|3153|cc|cuin|1|abbr=on}}
1976-1984 E24 633CSi — {{convert|145|or|147|kW|PS bhp|0|abbr=on}} in Euro spec, {{convert|128-130|kW|bhp|0|abbr=on}} in USA spec
1976-1979 E3 3.3 Li — {{cvt|147|kW|PS bhp|0}}{{cite web|title=1977 BMW 3.3 Li (model up to mid-year 1977 for Europe ) specifications|url=http://www.automobile-catalog.com/car/1977/77855/bmw_3_3_li.html|website=www.automobile-catalog.com|access-date=1 September 2017}}
1977-1984 E23 733i — {{cvt|147|kW|PS bhp|0}} in Euro spec,{{cite web|title=BMW 733i, 1977 MY E23|url=http://www.carfolio.com/specifications/models/car/?car=253517|website=www.carfolio.com|access-date=1 September 2017}} {{convert|130-145|kW|bhp|0|abbr=on}} in USA spec
1979-1981 E12 533i — North America only, {{convert|135|kW|bhp|0|abbr=on}}{{cite web|title=1984 BMW 533i (model since mid-year 1983 for North America U.S.) specifications|url=http://www.automobile-catalog.com/car/1984/263720/bmw_533i.html|website=www.automobile-catalog.com|access-date=1 September 2017}}
1979-1986 E23 732i — {{convert|144|kW|PS bhp|0|abbr=on}}
1982-1984 E28 533i — North America only, {{cvt|135|kW|hp PS|0}}
1984-1986 E30 333i — South Africa only, {{cvt|145|kW|hp PS|0}}, special ALPINA Intake plenum and exhaust manifold, modified L-Jetronic Injection. Only 210 (including six test cars) were produced for local Group 1 homologation.{{cite web | url = https://www.speedhunters.com/2019/10/333i-south-africas-answer-e30-m3/ | archive-url = https://web.archive.org/web/20221222170657/https://www.speedhunters.com/2019/10/333i-south-africas-answer-e30-m3/ | archive-date = 2022-12-22 | title = 333i: South Africa's Answer To The E30 M3 | first = Stefan | last = Kotzé | date = 2019-10-02 | work = Speedhunters | publisher = Electronic Arts Inc. }}

= M30B33V =

The carburetted M30B33 produces {{cvt|190|PS|kW PS bhp|0|order=out}} and {{convert|289|Nm|lbft|0|abbr=on}}.{{citation | ref = AR74 | title = Automobil Revue '74 | editor1-last = Braunschweig | editor1-first = Robert | display-editors = et al | language = de, fr | publisher = Hallwag AG | page = 199 | location = Berne, Switzerland | volume = 69 | date = 14 March 1974 | isbn = ((3-444-66015-1)) }}{{Cite book | title = World Cars 1975 | publisher = L'Editrice dell'Automobile LEA/Herald Books | location = Pelham, NY | ref = WC75 | page = 109 | year = 1975 | isbn = 0-910714-07-X }} It has a bore of {{convert|89|mm|2|abbr=on}} and a stroke of {{convert|88|mm|2|abbr=on}}.

Applications:

1973-1975 E3 3.3 L{{cite web|title=E3 3.3L model selection|url=http://www.realoem.com/bmw/en/select?product=P&archive=1&series=E3&body=Lim&model=3.3L&market=EUR&prod=19740100&engine=M30&steering=L|website=www.realoem.com|access-date=1 September 2017}}

= M30B34 =

The M30B34 engines sold in Europe and most other markets used a 10.0:1 compression ratio and produced {{cvt|218|PS|kW PS hp|0|order=out}}.{{cite web|title=1985 BMW E28 5 Series M535i Specs|url=http://www.ultimatespecs.com/car-specs/BMW/1270/BMW-E28-5-Series-M535i.html|website=www.ultimatespecs.com}} In North America and Japan, the M30B34 used an 8.0:1 compression ratio and produced {{cvt|185|PS|kW PS hp|0|order=out}}.{{cite web|title=1985 BMW E28 5 Series M535i Kat Specs|url=http://www.ultimatespecs.com/car-specs/BMW/1410/BMW-E28-5-Series-M535i-Kat.html|website=www.ultimatespecs.com}} This engine was also offered in Europe from the latter half of 1985 until mid-1987.{{refpage|page=238}} In all markets, the Bosch Motronic digital fuel injection system was used. The bore is {{convert|92|mm|2|abbr=on}} and the stroke is {{convert|86|mm|2|abbr=on}}.

Applications:

1982-1987 E23 735i / L7
1982-1987 E24 635CSi / L6 — {{cvt|218|PS|kW|0}} in Euro spec{{refpage|page=241}}
1985-1988 E28 535i / 535is / M535i

=M30B35=

File:Bmw-m30b35-right.jpg

This engine has a capacity of {{convert|3430|cc|cuin|1|abbr=on}}, despite the "B35" model code. It produces {{cvt|155|kW|PS hp|0}} at 5700 rpm and {{cvt|305|Nm|lbft|0}} at 4000 rpm, has a compression ratio of 9.0:1 and uses Bosch Motronic 1.3 digital fuel injection. It was also offered without a catalytic converter for certain markets; this version produces {{cvt|162|kW|PS hp|0}} and {{cvt|315|Nm|lbft|0}} at the same engine speeds.{{Cite book|url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3562886|title=BMW 7' [E32] Pressevorstellung | trans-title = BMW 7 (E32) Press Presentation | language = de | date=8 September 1986|pages = 56–57 | publisher=BMW AG |access-date=30 December 2018}}

Applications:

1988-1989 E24 635CSi
1986-1992 E32 735i{{Cite web|url=https://www.ultimatespecs.com/car-specs/BMW/1591/BMW-E32-7-Series-735i.html|title=BMW E32 7 Series 735i Technical Specs, Dimensions|website=www.ultimatespecs.com|language=en|access-date=2018-12-29}}
1987-1992 E34 535i
1988-1989 Rayton Fissore Magnum 3.5{{cite book | ref = AR89 | title = Automobil Revue 1989 | editor-last = Büschi | editor-first = Hans-Ulrich | publisher = Hallwag AG | location = Berne, Switzerland | language = de, fr | page = 498 | volume = 84 | date = March 9, 1989 | isbn = 3-444-00482-6 }}

Turbocharging

The M30 was the basis for the turbocharged M102 and M106 engines.

The Alpina B10 Biturbo used a modified version of the M30, with two turbochargers and forged pistons. Producing {{cvt|265|kW|PS bhp|0}} at 6000 rpm and {{cvt|520|Nm|lbft|0}} at 4000 rpm, the engine made this car the fastest sedan in the world. The final 50 M30 blocks were shipped to Alpina for use in the final 50 B10 Biturbos.{{cite journal|last=Palevsky|first=Alexander|title=Blown Away|journal=Bimmer Magazine|issue=October 2007|page=62}}

=M102=

The M102 was produced from 1980 to 1982. It was BMW's first turbocharged six-cylinder engine.

The M102 (also known as M30B32LAE){{cite web |url=http://www.bmwe23.nl/http/BMW%20Engine%20Numbers.htm |title=BMW Engine Numbers |access-date=2012-08-18 |url-status=dead |archive-url=https://web.archive.org/web/20131115021836/http://www.bmwe23.nl/http/BMW%20Engine%20Numbers.htm |archive-date=2013-11-15 }} has a displacement of {{convert|3210|cc|cuin|1|abbr=on}}.{{Cite web|url=http://www.bmwheaven.com/database/engine.php?type=M30#/131|title=BMW Heaven Specification Database | Engine specifications for M30 engines|website=Bmwheaven.com|access-date=14 November 2021}} The KKK K27 turbocharger produces {{convert|9|psi|bar|abbr=on}} of boost and an air-to-air intercooler is used.{{cite web|title=The BMW Six Cylinder Guide|url=http://www.autospeed.com/cms/article.html?&title=The-BMW-Six-Cylinder-Guide&A=2948|website=Autospeed.com}} The compression ratio is 7.0:1.{{cite web|title=BMW 745i E23 Turbo|url=https://www.uniquecarsandparts.com.au/car_info_bmw_745i_turbo|website=Uniquecarsandparts.com.au|access-date=16 September 2017}}

The M102 produces {{cvt|188|kW|PS bhp|0}} and was used in the E23 7 Series, in the model was designated "745i".{{cite web | url = http://autospeed.com/cms/A_2107/article.html | title = 2004 Engine Epic - BMW Engines | access-date = 2008-05-01 | author = Michael Knowling | date = 2004-04-26 | work = AutoSpeed | publisher = Web Publications Pty Limited | archive-url= https://web.archive.org/web/20080509012508/http://autospeed.com/cms/A_2107/article.html| archive-date= 9 May 2008 | url-status= live}} The M102 was not available in right-hand drive cars, leading to the South African 745i using the BMW M88 naturally aspirated DOHC straight-six engine instead.

Applications:

1980–1982 E23 745i

=M106=

The M106 (also called M30B34MAE) replaced the M102 and was produced from 1982 to 1986.

Some of the M106's upgrades over its predecessor are a result of the M30B34 version of the M30, which was also released in 1982. These upgrades include Bosch Motronic engine management and an increased displacement to {{convert|3430|cc|cuin|1|abbr=on}}. The compression ratio was increased from 7.0:1 to 8.0:1.

Peak power output is the same {{cvt|185|kW|PS bhp|0}} as the M102,{{Cite web|url=http://www.bmwheaven.com/database/engine.php?type=M30#/135|title=BMW Heaven Specification Database | Engine specifications for M30 engines|website=Bmwheaven.com|access-date=14 November 2021}} however it occurs at lower RPM{{Cite web|url=https://paultan.org/2008/01/24/the-m102-m106-in-the-bmw-745i-turbo/|title=The M102/M106 in the BMW 745i Turbo|website=Paultan.org|date=24 January 2008|access-date=14 November 2021}} and peak boost is reduced from {{convert|9|to|6|psi|bar|abbr=on}}.{{Cite web|url=https://www.uniquecarsandparts.com.au/car_info_bmw_745i_turbo|title=BMW 745i E23 Turbo|website=Uniquecarsandparts.com.au|access-date=14 November 2021}}

There was no direct successor to the M106, however BMW's next turbocharged petrol engine was the BMW N54, introduced in 2006.

Applications:

1982–1986 E23 745i

Motorsport

File:BMW E24 635 CSi Grp A Works Original BMW Teile front side.JPG

The M30 powered a series of E9 CSL and E24 6 Series coupes to European Touring Car Championship (ETCC) throughout the 1970s and into the middle 1980s, even though a more powerful DOHC 24-valve head had been developed for high-performance motorsports and street use.

The BMW M88 high-performance engine is based on the M30 block.{{cite web|title=FAQ E23 745i SA (M88)|url=http://www.bmwmregistry.com/model_faq.php?id=4|website=www.bmwmregistry.com|access-date=1 September 2017}}

References

M30

Category:Straight-six engines

Category:Gasoline engines by model

class="wikitable sortable" style="text-align: center;" !Version!!Displacement!!Power output!!Torque!!Year
M30B25V	rowspan=2\|{{convert\|2494\|cc\|cuin\|1\|abbr=on}}	rowspan=2\|{{cvt\|150\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|211\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1968
M30B25	{{convert\|215\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1981
M30B28V	rowspan=2\|{{convert\|2788\|cc\|cuin\|1\|abbr=on}}	{{cvt\|170\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|235\|Nm\|lbft\|0\|abbr=on}} at 3,700	1968
M30B28	{{convert\|135\|kW\|bhp\|0\|abbr=on}} at 5,800 rpm	{{convert\|240\|Nm\|lbft\|0\|abbr=on}} at 4,200 rpm	1977
M30B30V	rowspan=2\|{{convert\|2986\|cc\|cuin\|1\|abbr=on}}	{{cvt\|180\|PS\|kW PS bhp\|0\|order=out}} at 6,000 rpm	{{convert\|255\|Nm\|lbft\|0\|abbr=on}} at 3,700 rpm	1971
M30B30	{{cvt\|200\|PS\|kW PS bhp\|0\|order=out}} at 5,500 rpm	{{convert\|272\|Nm\|lbft\|0\|abbr=on}} at 4,300 rpm	1971
M30B32	{{convert\|3210\|cc\|cuin\|1\|abbr=on}}	{{cvt\|200\|PS\|kW PS bhp\|0\|order=out}} at 5,500 rpm	{{convert\|285\|Nm\|lbft\|0\|abbr=on}} at 4,300 rpm	1976
M30B33V	{{convert\|3295\|cc\|cuin\|1\|abbr=on}}	{{convert\|139\|kW\|bhp\|0\|abbr=on}} at 5,500 rpm	{{convert\|289\|Nm\|lbft\|0\|abbr=on}} at 3,500 rpm	1973
M30B34	rowspan=2\|{{convert\|3430\|cc\|cuin\|1\|abbr=on}}	{{convert\|160\|kW\|bhp\|0\|abbr=on}} at 5,800 rpm	{{convert\|310\|Nm\|lbft\|0\|abbr=on}} at 4,200 rpm	\|1982
M30B35	{{convert\|155\|kW\|bhp\|0\|abbr=on}} at 5,700 rpm	{{convert\|305\|Nm\|lbft\|0\|abbr=on}} at 4,000 rpm	1988

BMW M30#M30B30

Design

M30B35LE/M90 engine

Versions

= M30B25V =

= M30B25 =

= M30B28V =

= M30B28 =

= M30B30V =

= M30B30 =

= M30B32 =

= M30B33V =

= M30B34 =

=M30B35=

Turbocharging

=M102=

=M106=

Motorsport

See also

References