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The BMW S85 is a naturally aspirated V10 petrol engine which replaced the BMW S62 V8 engine in the M5 model and was produced from 2005–2010. It was both BMW's first and only production V10 engine, and the first petrol V10 engine to be available in a production sedan (saloon).

BMW S85 engine
S85B50 in a E60 M5
Overview
Manufacturer BMW
Production20052010
Layout
Configuration90° V10/V12 engine (CS concept)
Displacement5.0 L (305 cu in)/6.0 L (366 cu in) (CS concept)
Block materialAluminium
Head materialAluminium
ValvetrainDOHC w/ VVT
Combustion
Fuel typePetrol
Output
Power output373 kW (500 hp)
Torque output520 N⋅m (384 lb⋅ft)
Chronology
PredecessorNone
SuccessorBMW S65

Introduced in the E60 M5, the S85 was inspired by BMW's previous Formula One involvement.[1] Unlike most other BMW M engines, the S85 is not related to a regular production BMW engine.[2]

The BMW S65 V8 engine (used in the E92 M3) is based on the S85.


Nomenclature


As the S85 was BMW's first V10 engine, it was given a new series in the BMW's engine codes. The "60s" were used for V8 engines and the "70s" were used for V12 engines, therefore the V10 was allocated in the "80s" (despite having fewer cylinders than the V12 engines in the "70s".)

The engine code for the related BMW S65 V8 engine reflects its link to the S85. The S65 code was selected to signify that the V8 is largely derived from the S85 minus two cylinders, and not related to BMW's other V8s.[3]


Design


Compilation of the four side views of the BMW V10 engine as it is installed in the BMW M5 and M6
Compilation of the four side views of the BMW V10 engine as it is installed in the BMW M5 and M6
VersionYearDisplacementPowerTorque
S85B502005–20104,999 cc (305.1 cu in)373 kW (500 hp)
at 7,500 rpm
520 N⋅m (384 lb⋅ft)
at 6,100 rpm

The S85 has dual overhead camshafts with four valves per cylinder and double-VANOS (variable valve timing).[4] The engine block and cylinder head are constructed from aluminum alloy.[5]

Peak power is 373 kW (500 bhp) at 7,750 rpm and peak torque is 520 N⋅m (384 lb⋅ft) at 6,100 rpm.[6] The redline is 8,250 rpm,[2] and the specific output of 74.6 kW (100.0 bhp) per litre is amongst the highest of naturally aspirated production car engines.

Features include:


Awards


The S85 has won the following awards at the International Engine of the Year:[13]


Applications



References


  1. "BMW M5 - 2004 Geneva Auto Show". Insideline.com. 15 May 2007. Archived from the original on 12 June 2012.
  2. "2006 BMW M5 - First Drive Review". www.caranddriver.com. December 2004. Archived from the original on 6 September 2011. Retrieved 23 February 2012.
  3. "FAQ - E90 + E92 + E93 M3". www.bmwmregistry.com. Archived from the original on 22 October 2016. Retrieved 21 July 2017.
  4. "2006 BMW M5 review". www.roadandtrack.com. 6 November 2012. Archived from the original on 18 August 2017. Retrieved 25 July 2017.
  5. "BMW S85 engine reliability, problems and repair". mywikimotors.com. Archived from the original on 2 August 2017. Retrieved 25 July 2017.
  6. "BMW M5 Sedan Engine and Chassis Technical Data". BMW AG. Archived from the original on 12 August 2008. Retrieved 4 July 2017.
  7. "BMW S85 V10 and S65 V8 Engines". www.unixnerd.demon.co.uk. Archived from the original on 23 January 2016. Retrieved 28 July 2017.
  8. "BMW Retires the M6 & The Mighty S85 V10". www.bimmerfile.com. 8 September 2010. Archived from the original on 13 October 2017. Retrieved 4 July 2017.
  9. "BMW's new V10 engine in detail". www.newatlas.com. 21 January 2004. Archived from the original on 14 April 2017. Retrieved 25 July 2017.
  10. "BMW S85 engine". www.australiancar.reviews. Archived from the original on 20 July 2017. Retrieved 25 July 2017.
  11. "A Look at the BMW M5's New V10 Engine". Archived from the original on 2019-01-08. Retrieved 2017-07-27.
  12. "Review: BMW E60 LCI M5 (2007-10)". www.ukcar.reviews. Archived from the original on 30 March 2018. Retrieved 25 July 2017.
  13. "International Engine of the Year - Archive". www.ukimediaevents.com. Archived from the original on 3 December 2017. Retrieved 28 July 2017.

На других языках


[de] BMW S85

Der BMW S85 ist ein V10-Saugmotor mit 40 Ventilen, der im E60/E61 M5 und E63/E64 M6 verbaut wurde. Bei der Konstruktion flossen einige Inspirationen des Formel-1-V8-Motors (P86) des BMW Sauber F1-Rennwagens mit ein. Der Motor löste den S62-Motor aus dem Vorgänger-M5 (E39) ab.
- [en] BMW S85

[fr] Moteur BMW S85

Le moteur BMW S85B50 est un moteur V10 qui a remplacé le S62 et a été produit entre 2005-2010. Utilisé dans la E60 M5 berline, M5 E61 touring et E63/64 M6 coupé, il a été inspiré par BMW lors de sa participation en Formule 1[1].

[it] BMW S85

Il BMW S85 (per esteso S85B50) è un motore V10 a Ciclo Otto e prodotto dal 2005 al 2010 dalla Casa automobilistica tedesca BMW.



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