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- Engines
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Changes from revision 3 to revision 3
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BMW automotive engine families listed as S14. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW S14
FieldReported valueProduction1986-1991ConfigurationInline-4Displacement2.0 L (1,990 cc) 2.3 L (2,302 cc) 2.5 L (2,467 cc)Cylinder bore93.4 mm (3.68 in) 95 mm (3.74 in)Piston stroke72.6 mm (2.86 in) 84 mm (3.31 in) 87 mm (3.43 in)Cylinder block materialCast ironCylinder head materialAluminiumValvetrainDOHCFuel typePetrolPredecessorNoneSuccessorNone
Variant specifications
Versions
VersionDisplacementPowerTorqueYearS14B201,990 cc (121.4 cu in)141 kW (189 bhp) at 6,900 rpm210 N⋅m (155 lb⋅ft) at 4,900 rpm1987-1990S14B232,302 cc (140.5 cu in)143 kW (192 bhp) at 6,750 rpm230 N⋅m (170 lb⋅ft) at 4,750 rpm1986–1989S14B232,302 cc (140.5 cu in)147 kW (197 bhp) at 6,750 rpm240 N⋅m (177 lb⋅ft) at 4,750 rpm1986–1989S14B232,302 cc (140.5 cu in)158 kW (212 bhp) at 6,750 rpm230 N⋅m (170 lb⋅ft) at 4,600 rpm1989–1991S14B23 EVO22,302 cc (140.5 cu in)162 kW (217 bhp) at 6,750 rpm245 N⋅m (181 lb⋅ft) at 4,750 rpm1988-1990S14B25 EVO32,467 cc (150.5 cu in)175 kW (235 bhp) at 7,000 rpm240 N⋅m (177 lb⋅ft) at 4,750 rpm1989-1990
BMW automotive engine directory
Design, development and variant notes
The S14 combines an M10-derived block with a four-cylinder head related to the S38 design. Its intake uses two throttle-body assemblies, each containing two butterflies.
The 1,990 cc S14B20 was intended for displacement-sensitive Italian and Portuguese markets. The S14B23 had several output and emissions configurations; the later S14B25 Evo 3 grew to 2,467 cc.
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
Wikipedia: List of BMW engines. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1382309748; accessed 2026-11-10.Wikipedia: BMW S14. Wikipedia contributors; CC BY-SA 4.0. Source revision oldid 1378732100; accessed 2026-11-10.
Further Wikipedia-sourced details
The following additional information is drawn from the cited Wikipedia revision by Wikipedia contributors, available under CC BY-SA 4.0. An open-ended date reflects the source snapshot, not confirmed current production or fitment.
Additional recorded applications
Source version or ratingVehicle application as recordedS14B201987-1990 E30 320iS (Italy and Portugal only)S14B231986-1991 E30 M3S14B23 EVO21988-1990 E30 M3S14B25 EVO31989-1990 E30 M3
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Revision 3: BMW S14 engines
BMW automotive engine families listed as S14. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW S14
| Field | Reported value |
|---|
| Production | 1986-1991 |
| Configuration | Inline-4 |
| Displacement | 2.0 L (1,990 cc) 2.3 L (2,302 cc) 2.5 L (2,467 cc) |
| Cylinder bore | 93.4 mm (3.68 in) 95 mm (3.74 in) |
| Piston stroke | 72.6 mm (2.86 in) 84 mm (3.31 in) 87 mm (3.43 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC |
| Fuel type | Petrol |
| Predecessor | None |
| Successor | None |
Variant specifications
Versions
| Version | Displacement | Power | Torque | Year |
|---|
| S14B20 | 1,990 cc (121.4 cu in) | 141 kW (189 bhp) at 6,900 rpm | 210 N⋅m (155 lb⋅ft) at 4,900 rpm | 1987-1990 |
| S14B23 | 2,302 cc (140.5 cu in) | 143 kW (192 bhp) at 6,750 rpm | 230 N⋅m (170 lb⋅ft) at 4,750 rpm | 1986–1989 |
| S14B23 | 2,302 cc (140.5 cu in) | 147 kW (197 bhp) at 6,750 rpm | 240 N⋅m (177 lb⋅ft) at 4,750 rpm | 1986–1989 |
| S14B23 | 2,302 cc (140.5 cu in) | 158 kW (212 bhp) at 6,750 rpm | 230 N⋅m (170 lb⋅ft) at 4,600 rpm | 1989–1991 |
| S14B23 EVO2 | 2,302 cc (140.5 cu in) | 162 kW (217 bhp) at 6,750 rpm | 245 N⋅m (181 lb⋅ft) at 4,750 rpm | 1988-1990 |
| S14B25 EVO3 | 2,467 cc (150.5 cu in) | 175 kW (235 bhp) at 7,000 rpm | 240 N⋅m (177 lb⋅ft) at 4,750 rpm | 1989-1990 |
BMW automotive engine directory
Design, development and variant notes
The S14 combines an M10-derived block with a four-cylinder head related to the S38 design. Its intake uses two throttle-body assemblies, each containing two butterflies.
The 1,990 cc S14B20 was intended for displacement-sensitive Italian and Portuguese markets. The S14B23 had several output and emissions configurations; the later S14B25 Evo 3 grew to 2,467 cc.
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
Further Wikipedia-sourced details
The following additional information is drawn from the cited Wikipedia revision by Wikipedia contributors, available under CC BY-SA 4.0. An open-ended date reflects the source snapshot, not confirmed current production or fitment.
Additional recorded applications
| Source version or rating | Vehicle application as recorded |
|---|
| S14B20 | 1987-1990 E30 320iS (Italy and Portugal only) |
| S14B23 | 1986-1991 E30 M3 |
| S14B23 EVO2 | 1988-1990 E30 M3 |
| S14B25 EVO3 | 1989-1990 E30 M3 |
Revision 3: BMW S14 engines
BMW automotive engine families listed as S14. Specifications below retain the source's separate family and variant labels.
Family specifications
BMW S14
| Field | Reported value |
|---|
| Production | 1986-1991 |
| Configuration | Inline-4 |
| Displacement | 2.0 L (1,990 cc) 2.3 L (2,302 cc) 2.5 L (2,467 cc) |
| Cylinder bore | 93.4 mm (3.68 in) 95 mm (3.74 in) |
| Piston stroke | 72.6 mm (2.86 in) 84 mm (3.31 in) 87 mm (3.43 in) |
| Cylinder block material | Cast iron |
| Cylinder head material | Aluminium |
| Valvetrain | DOHC |
| Fuel type | Petrol |
| Predecessor | None |
| Successor | None |
Variant specifications
Versions
| Version | Displacement | Power | Torque | Year |
|---|
| S14B20 | 1,990 cc (121.4 cu in) | 141 kW (189 bhp) at 6,900 rpm | 210 N⋅m (155 lb⋅ft) at 4,900 rpm | 1987-1990 |
| S14B23 | 2,302 cc (140.5 cu in) | 143 kW (192 bhp) at 6,750 rpm | 230 N⋅m (170 lb⋅ft) at 4,750 rpm | 1986–1989 |
| S14B23 | 2,302 cc (140.5 cu in) | 147 kW (197 bhp) at 6,750 rpm | 240 N⋅m (177 lb⋅ft) at 4,750 rpm | 1986–1989 |
| S14B23 | 2,302 cc (140.5 cu in) | 158 kW (212 bhp) at 6,750 rpm | 230 N⋅m (170 lb⋅ft) at 4,600 rpm | 1989–1991 |
| S14B23 EVO2 | 2,302 cc (140.5 cu in) | 162 kW (217 bhp) at 6,750 rpm | 245 N⋅m (181 lb⋅ft) at 4,750 rpm | 1988-1990 |
| S14B25 EVO3 | 2,467 cc (150.5 cu in) | 175 kW (235 bhp) at 7,000 rpm | 240 N⋅m (177 lb⋅ft) at 4,750 rpm | 1989-1990 |
BMW automotive engine directory
Design, development and variant notes
The S14 combines an M10-derived block with a four-cylinder head related to the S38 design. Its intake uses two throttle-body assemblies, each containing two butterflies.
The 1,990 cc S14B20 was intended for displacement-sensitive Italian and Portuguese markets. The S14B23 had several output and emissions configurations; the later S14B25 Evo 3 grew to 2,467 cc.
Data adapted from the cited Wikipedia revision by Wikipedia contributors under CC BY-SA 4.0. Production dates and fitments reflect that revision; verify the exact engine code, market and vehicle before applying a specification.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
Further Wikipedia-sourced details
The following additional information is drawn from the cited Wikipedia revision by Wikipedia contributors, available under CC BY-SA 4.0. An open-ended date reflects the source snapshot, not confirmed current production or fitment.
Additional recorded applications
| Source version or rating | Vehicle application as recorded |
|---|
| S14B20 | 1987-1990 E30 320iS (Italy and Portugal only) |
| S14B23 | 1986-1991 E30 M3 |
| S14B23 EVO2 | 1988-1990 E30 M3 |
| S14B25 EVO3 | 1989-1990 E30 M3 |