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BMW N55#N55B30T0 (265 kW)

{{Short description|BMW engine manufactured from 2009 to 2021}}

{{Infobox automobile engine

| name = BMW N55

| image = BMW N55 engine 2013.jpg

| manufacturer =

| production = 2009–2021

| configuration = Straight-6

| displacement ={{convert|2979|cc|L|1|order=flip|abbr=on}}

| bore = {{convert|84|mm|in|1|abbr=on}}

| head = Aluminium

| stroke = {{convert|89.6|mm|in|1|abbr=on}}

| block = Aluminium

| valvetrain = DOHC, with VVT & VVL

| timing = Chain

| compression = 10.2:1

| redline = 7,000 RPM

| turbocharger = Single BorgWarner twin-scroll with Intercooler

| management = Bosch MEVD 17.2

| fueltype = Petrol

| predecessor = BMW N54

| successor = BMW B58

}}

The BMW N55 is a turbocharged straight-six petrol (gasoline) engine that began production in 2009. The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.

The N55 was BMW's first straight-six engine to use a twin-scroll turbocharger. It also won three straight Ward's 10 Best Engines awards in 2011–2013.{{cite web|title=Ward's 10 Best Engines Winners, 1995–2012|url=https://wardsintelligence.informa.com/WI023238/|website=wardsintelligence.informa.com|date=5 January 2012|access-date=21 December 2021|archive-url=https://web.archive.org/web/20120311095404/http://wardsauto.com/datasheet/wards-10-best-engines-winners-1995-2012|archive-date=11 March 2012|url-status=dead}}

Following the introduction of the BMW B58 engine in 2015, the N55 began to be phased out.{{cite web|title=BMW University Technical Training- B58 Engine|url=http://s3.bimmerfile.com.s3.amazonaws.com/wp-content/uploads/2015/09/BMW_B58_Engine.pdf|website=Bimmerfile.com}}

The BMW S55 engine is a high performance version of the N55 made by BMW M GmbH, which is used by the F80 M3, F82 M4 and F87 M2 Competition/CS.

Design

The main differences between the N55 and its N54 predecessor are the use of a single turbocharger, the addition of Valvetronic and the type of fuel injectors. Whilst the N54 used a twin-turbo arrangement, the newer N55 uses only a single twin scroll turbocharger.{{Cite web |author=Ryan ZumMallen |url=http://www.automedia.com/Blog/Post/Pop-The-Hood-Inside-the-Innovative-N55-Engine-in-the-BMW-335i.aspx |title=Pop The Hood: Inside the Innovative N55 Engine in the BMW 335i |website=Automedia.com |access-date=2012-08-13 |archive-date=2012-08-04 |archive-url=https://web.archive.org/web/20120804203223/http://www.automedia.com/Blog/Post/Pop-The-Hood-Inside-the-Innovative-N55-Engine-in-the-BMW-335i.aspx |url-status=dead }}{{Cite web|url=http://www.motorauthority.com/news/1033297_bmw-unveils-single-turbo-n55-six-cylinder-engine-for-new-5-series-gt |title=BMW unveils single turbo N55 six-cylinder engine for new 5-series GT |website=Motorauthority.com|date=26 May 2009 }} Valvetronic (variable valve lift) is claimed to improve throttle response, low-rev torque, exhaust emissions and to reduce fuel consumption by 15%.{{cite web|title=BMW N54 and N55 Six Cylinder Turbocharged Engines|url=http://www.unixnerd.demon.co.uk/n54.html|website=Unixnerd.demon.co.uk|access-date=20 December 2017|archive-date=20 February 2020|archive-url=https://web.archive.org/web/20200220005506/http://www.unixnerd.demon.co.uk/n54.html|url-status=dead}}{{Cite web|url=https://www.wardsauto.com/news-analysis/bmw-s-newest-i-6-better-not-bigger|title=BMW's Newest I-6 Better, Not Bigger |website=Wardsauto.com}}{{Cite web|url=http://www.caranddriver.com/reviews/car/10q2/2011_bmw_335i_sedan-first_drive_review |title=2011 BMW 335i Sedan |website=Caranddriver.com}} The direct injection system uses solenoid-type injectors, instead of the piezo-type fuel injectors used by its N54 predecessor. The piezo injectors were more expensive and BMW decided they were not worthwhile outside of Europe, because the potential benefits of lean-burn operation could not be fully realised.

The exhaust manifold design, called Cylinder-bank Comprehensive Manifold (CCM) by BMW, aims to reduce the pressure fluctuations to reduce throttle lag and exhaust back-pressure.{{Cite web|url=http://www.bimmerfile.com/2009/05/01/exclusive-the-new-m-motor-in-depth/ |title=The NEW ///M Motor in Depth |website=Bimmerfile.com|date=May 2009 }} The twin-scroll turbocharger uses 2 sets of exhaust duct to turn 1 turbine wheel, with cylinders 1–3 and 4–6.{{cite web|title=Turbocharging Technology (F30) |url=http://www.kneb.net/bmw/F30/08_Turbocharging%20Technology.pdf |website=Kneb.net |url-status=dead |archive-url=https://web.archive.org/web/20150615011535/http://www.kneb.net/bmw/F30/08_Turbocharging%20Technology.pdf |archive-date=2015-06-15 }} The engine management system is Bosch MEVD 17.2, and compatible fuels are ROZ (RON) 91–98 octane (minimum RON 95 is recommended),{{cite web|title=F30 powertrain |url=http://prodcds.bmwuniversity.com/library/bmw/Technician/Technical%20Training%202011/ST1113%20F30%20Complete%20Vehicle/02_F30%20Powertrain.pdf |website=bmwuniversity.com |url-status=dead |archive-url=https://web.archive.org/web/20140603225157/http://prodcds.bmwuniversity.com/library/bmw/Technician/Technical%20Training%202011/ST1113%20F30%20Complete%20Vehicle/02_F30%20Powertrain.pdf |archive-date=2014-06-03 }}{{cite web|title=Engine Electronics IPO's (F01-02) |url=http://www.kneb.net/bmw/F01-02/02_Engine%20Electronics%20IPOs.pdf |website=Kneb.net |url-status=dead |archive-url=https://web.archive.org/web/20140603225215/http://www.kneb.net/bmw/F01-02/02_Engine%20Electronics%20IPOs.pdf |archive-date=2014-06-03 }}

As per the N54, the compression ratio is 10.2:1, the bore is {{convert|84.0|mm|in|abbr=on}}, the stroke is {{convert|89.6|mm|in|abbr=on}} and the displacement is {{convert|2979|cc|cuin|1|abbr=on}}.

Versions

class="wikitable sortable" style="text-align: center;"
VersionPowerTorqueRedlineYears
N55B30M0{{convert|225|kW|bhp|0|abbr=on}}
at 5,700–5,800 rpm		{{convert|400|Nm|lbft|0|abbr=on}}
at 1,200–5,000 rpm		rowspan="9" | 7,000 rpm2009–2019
N55B30{{convert|235|kW|bhp|0|abbr=on}}
at 4,505–6,000 rpm		rowspan="3" |{{convert|450|Nm|lbft|0|abbr=on}}
at 1,300–4,500 rpm		2011–present
N55B30O0{{convert|240|kW|bhp|0|abbr=on}}
at 4,505–6,000 rpm		2014–2016
N55HP{{convert|250|kW|bhp|0|abbr=on}}
at 4,505–6,000 rpm		2013–2015
rowspan=2|N55B30T0{{convert|265|kW|bhp|0|abbr=on}}
at 5,255–6,000 rpm		{{convert|465|Nm|lbft|0|abbr=on}}
at 1,350–5,250 rpm		rowspan="2" |2015–present
{{convert|272|kW|bhp|0|abbr=on}}
at 6,500 rpm		{{convert|500|Nm|lbft|0|abbr=on}}
at 1,450–4750 rpm
rowspan="3"|Alpina{{convert|301|kW|bhp|0|abbr=on}}
at 5,500–6,250 rpm		{{convert|600|Nm|lbft|0|abbr=on}} at
3,000–4,000 rpm		2013–2017
{{convert|324|kW|bhp|0|abbr=on}}
at 5,500–6250 rpm		|{{convert|660|Nm|lbft|0|abbr=on}} at
3,000–4,000 rpm		2017–present
{{convert|332|kW|bhp|0|abbr=on}}
at 5,500–6,250 rpm		{{convert|680|Nm|lbft|0|abbr=on}} at
3,000–4,500 rpm		2018–present

= N55B30M0 =

Applications:

= N55B30 =

Applications:

  • 2011–2018 F06/F12/F13 640i{{Cite web |url=http://blog.caranddriver.com/six-cylinder-2012-bmw-640i-coupe-priced-from-74475-convertible-from-81975/ |title=Six-Cylinder 2012 BMW 640i Coupe Priced from $74,475, Convertible from $81,975 |publisher=Blog.caranddriver.com |access-date=2011-09-24 |archive-date=2011-09-25 |archive-url=https://web.archive.org/web/20110925004150/http://blog.caranddriver.com/six-cylinder-2012-bmw-640i-coupe-priced-from-74475-convertible-from-81975/ |url-status=dead }}
  • 2012–2013 E82/E88 135is{{Cite web|url=http://www.bmwusa.com/Standard/Content/Vehicles/2013/1/135isCoupe/default.aspx?from=/Standard/Content/Vehicles/2013/1/135isCoupeRD.aspx&return=/Standard/Content/Vehicles/2013/1/135isCoupeRD.aspx/ |title=BMW 135is Coupe – Model Overview|website=Bmwusa.com}}
  • 2012–2015 F20/F21 M135i{{Cite web|url=http://www.autoblog.com/2012/07/24/2012-bmw-m135i-first-drive-review/ |title=2012 BMW M135i |website=Autoblog.com|date=24 July 2012 }}{{Cite web|url=http://www.ausmotive.com/2012/07/16/bmws-m135i-is-much-better-than-it-looks.html |title=BMW's M135i is much better than it looks |website=Ausmotive.com}}
  • 2012–2015 F01/F02 740i/Li

= N55B30O0 =

Applications:

= N55HP =

Applications:

  • 2013–2015 F30 ActiveHybrid 3
  • 2011–2016 F10 ActiveHybrid 5

= N55B30T0 =

Applications:

  • 2016–2018 F87 M2 — {{convert|272|kW|bhp|0|abbr=on}}
  • 2015–2018 F26 X4 M40i — {{convert|265|kW|bhp|0|abbr=on}}

= Alpina =

Biturbo engine by Alpina based on the N55B30M0. The crankcase is of a different design and specially cast by BMW for Alpina.{{Cite news|url=http://www.motoring.com.au/the-alpina-philosophy-105210|title=The Alpina philosophy – motoring.com.au|last=Gratton|first=Ken|date=2016-12-23|newspaper=motoring.com.au|language=en-US|access-date=2016-12-24}}

== 301 kW version ==

The N55R20A is Alpina's initial version of the N55, producing {{convert|301|kW|bhp|0|abbr=on}}. The twin turbocharger system of the N54B30 is used, replacing the twin-scroll charging system originally applied.

Applications:

  • 2013–2017 Alpina F30 B3 Bi-Turbo{{Cite web|url=http://rvcs-prodweb.dot.gov.au/perl/47254_1126450_RVD_20Apr2015083100.cmd|title=Road Vehicle Descriptor (RVD1)|website=rvcs-prodweb.dot.gov.au|access-date=2016-11-24}}
  • 2013–2017 Alpina F33/F34 B4 Bi-Turbo

== 324 kW version ==

Applications:

  • 2017–present Alpina F30/F31 B3 S Bi-Turbo
  • 2017–present Alpina F32/F33 B4 S Bi-Turbo

== 332 kW version ==

Application:

S55 engine {{Anchor|S55}}

{{Infobox automobile engine

|name =BMW S55 engine

|image =2014 Washington Auto Show (12140974934).jpg

|configuration =Straight-6

|displacement ={{convert|2979|cc|cuin|0|abbr=on|lk=on}}

| bore = {{convert|84|mm|abbr=on|lk=on}}

| stroke = {{convert|89.6|mm|abbr=on}}

|block =Aluminium

|valvetrain =DOHC, with VVT & VVL

| redline = 7,600 RPM

|turbocharger = Twin-turbo

|fueltype =Petrol

|predecessor =BMW S54

|successor =BMW S58

}}

The S55 engine is the high performance engine developed from the N55 by BMW M. It was introduced in the F80 M3 and F82 M4 replacing the BMW S65 naturally aspirated V8 engine used in the previous generation M3 and was later used in the F87 M2 Competition/CS.

Differences compared with the N55 include a closed-deck engine block, lightweight crankshaft, different crankshaft bearings, strengthened pistons/rods, different springs/valve material, twin turbos, twin fuel pumps, active exhaust, revised cooling system and intercoolers.{{cite web|title=F80 M3 / F82 M4 Complete Technical Docs (With S55 Engine Guide)|url=http://f80.bimmerpost.com/forums/showthread.php?t=1015603|website=Bimmerpost.com}}{{cite web|title=Meet The New S55 Engine|url=http://www.bmwblog.com/2013/09/25/meet-new-s55-engine/|website=Bmwblog.com|date=25 September 2013 }}

= {{convert|205|kW|bhp|0|abbr=on}} – {{convert|268|kW|bhp|0|abbr=on}} version =

Applications:

  • 2020–2021 F87 M2 CS Racing{{Cite news|url=https://www.autodevot.com/2020/02/bmw-m2-cs-racing-north-american-debut-24-hours-daytona/|title=BMW M2 CS Racing makes its North American debut|work=autodevot.com|access-date=2020-02-02|language=en}}

= {{convert|302|kW|bhp|0|abbr=on}}, {{Convert|550|Nm|lbft|abbr=on}} version =

Applications:

  • 2019–2021 F87 M2 Competition{{Cite news|url=https://www.motormag.com.au/news/1804/bmw-m2-competition-specs-leaked|title=BMW M2 Competition specs leaked|work=MotorMag.com.au|access-date=2018-04-10|language=en}}

= {{convert|317|kW|bhp|0|abbr=on}} version =

Applications:

  • 2014–2018 F80 M3{{cite web|title=2013 BMW M3 F80 specifications|url=http://www.carfolio.com/specifications/models/car/?car=359381|website=Carfolio.com|access-date=21 July 2017}}
  • 2014–2020 F82/F83 M4

= {{convert|331|kW|bhp|0|abbr=on}} version =

Applications:

  • 2016–2018 F80 M3 with Competition package{{cite web|url=https://www.bmw.com.au/bmw-cars/m-series/2017-m3-sedan|title=BMW M3 Sedan – BMW Australia|website=Bmw.com.au|access-date=30 May 2018}}
  • 2016–2020 F82/F83 M4 with Competition package{{cite web|url=https://www.bmw.com.au/bmw-cars/m-series/2017-m4-coupe|title=BMW M4 Coupé – BMW Australia|website=Bmw.com.au|access-date=30 May 2018|archive-date=2 May 2018|archive-url=https://web.archive.org/web/20180502213719/https://www.bmw.com.au/bmw-cars/m-series/2017-m4-coupe|url-status=dead}}
  • 2020–2021 F87 M2 CS{{Cite web|url=https://bimmerlife.com/2019/11/06/444-horsepower-m2-cs-can-be-had-with-3-pedals/|title=444-Horsepower M2 CS Can Be Had With 3 Pedals|date=2019-11-06|website=BimmerLife|language=en-US|access-date=2019-12-31}}

= {{convert|338|kW|bhp|0|abbr=on}} version =

Applications:

  • 2018 F80 M3 CS
  • 2017–2020 F82 M4 CS

= {{convert|368|kW|hp|0|abbr=on}} version =

This version produces {{convert|368|kW|hp|0|abbr=on}} and {{convert|600|Nm|lbft|0|abbr=on}},{{cite web|title=2015 BMW M4 GTS specifications|url=https://www.carfolio.com/specifications/models/car/?car=440011|website=Carfolio.com|access-date=30 December 2017}} due to the use of a water injection system. Three water injectors are used to lower the temperature of the air in the intake manifold, allowing the boost pressure to be increased from {{convert|17.2|psi|bar|abbr=on}} to {{convert|21.6|psi|bar|abbr=on}}.{{cite web|title=First Drive Review – 2016 BMW M4 GTS|url=https://www.caranddriver.com/reviews/2016-bmw-m4-gts-drive-review|website=Caranddriver.com|access-date=30 December 2017}}{{cite web|title=The 2016 BMW M4 GTS is a street-legal water-injected track monster, and it's coming to the US|url=http://autoweek.com/article/car-news/just-add-water-2016-bmw-m4-gts-street-legal-water-injected-track-monster-and-its|website=Autoweek.com|access-date=30 December 2017}}

Applications:

  • 2015–2016 F82 M4 GTS
  • 2017 F82 M4 DTM Champion Edition{{cite web |title=BMW M4 DTM Champion Edition marking Marco Wittmann's 2016 DTM championship title. |url=https://www.press.bmwgroup.com/global/article/detail/T0264938EN/bmw-m4-dtm-champion-edition-marking-marco-wittmann%E2%80%99s-2016-dtm-championship-title?language=en |website=BMW PressClub Global |access-date=31 October 2019}}

See also

References

{{Reflist}}

{{BMW automotive petrol engines: 2000s to 2010s}}

N55

Category:Products introduced in 2009

Category:Straight-six engines

Category:Gasoline engines by model