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BMW S14

FieldValue
nameBMW S14
imageBMW S14 Engine.jpg
production1986-1991
configurationInline-4
blockCast iron
headAluminium
valvetrainDOHC
fueltypePetrol
displacement1990 cc
2302 cc
2467 cc
bore93.4 mm
95 mm
stroke72.6 mm
84 mm
87 mm
predecessorNone
successorNone

2302 cc 2467 cc 95 mm 84 mm 87 mm

The BMW S14 is a DOHC four-cylinder petrol engine which was used in the E30 M3, E30 320iS, and E36 318i Super Touring. It is based on the BMW M10 block and what is essentially a shortened BMW S38 cylinder head. The direct successor to the S14 was the S42 based on the M42 engine. The S42 was a racing engine installed in the E36 320i for the German Super Tourenwagen Cup. There is no direct successor to the S14 for production BMWs, since the following generation of M3 is powered by the BMW S50 six-cylinder engine.

Two separate throttle bodies are used, each incorporating two throttle butterfly plates.

Versions

VersionDisplacementPowerTorqueYear
S14B201990 cc141 kW
at 6,900 rpm210 Nm
at 4,900 rpm1987-1990
S14B232302 cc143 kW
at 6,750 rpm230 Nm
at 4,750 rpm1986–1989
147 kW
at 6,750 rpm240 Nm
at 4,750 rpm1986–1989
158 kW
at 6,750 rpm230 Nm
at 4,600 rpm1989–1991
S14B23 EVO2162 kW
at 6,750 rpm245 Nm
at 4,750 rpm1988-1990
S14B25 EVO32467 cc175 kW
at 7,000 rpm240 Nm
at 4,750 rpm1989-1990

S14B20

This version was only sold in Portugal and Italy. It has a displacement reduced to 1990 cc by shortening the stroke to 72.6 mm.

Applications:

  • 1987-1990 E30 320iS (Italy and Portugal only)

S14B23

The E30 M3 was initially released with the 147 kW S14B23 engine. Versions equipped with a catalytic converter produced 143 kW and 230 Nm. In April 1989, the Ravaglia and Cecotto limited edition M3s were released with a 158 kW S14B23 that would in September, 1989 become the standard motor for the E30 M3.

Applications:

  • 1986-1991 E30 M3

S14B23 EVO2

This update of the S14B23 produced 162 kW, or 158 kW if equipped with a catalytic converter.

Applications:

  • 1988-1990 E30 M3

S14B25 EVO3

In 1989, the displacement was enlarged to 2467 cc and this engine produced 175 kW.

Applications:

  • 1989-1990 E30 M3

References

References

  1. "BMW S14B23 automotive engine".
  2. "FAQ E30 320is (S14)". BMW M Registry.
  3. "M3 Vorstellung von 1986 Seite 13/32".
  4. "BMW S14B20 automobile engine".
  5. "Euro E30 320iS – Italian M3 | BMWE21.net – Jeroen's BMW E21 Network". Bmwe21.net.
  6. "BMW Heaven Specification Database | Engine specifications for Motorsport engines". Bmwheaven.com.
  7. "BMW M Registry - FAQ E30 M3".
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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