What is the compression ratio of the BMW B48 engine?

1 Answers
DelBlakely
07/30/25 5:11am
BMW B48 engine compression ratio is 10.7:1. Engine compression ratio: It is the ratio of the total cylinder volume to the combustion chamber volume in an internal combustion engine, which is an important structural parameter. When the piston is at bottom dead center, the cylinder has the maximum volume, denoted as Va; when the piston is at top dead center, the volume in the cylinder is called the combustion chamber volume, denoted as Vc. The compression ratio ε of the internal combustion engine is ε=Va/Vc. Compression ratio and fuel standards: 90-octane gasoline is suitable for gasoline cars with an engine compression ratio below 8.5. 92-octane gasoline is suitable for gasoline cars with an engine compression ratio between 8.6-9.9. 95-octane gasoline is suitable for gasoline cars with an engine compression ratio between 10.0-11.5. 98-octane gasoline is suitable for gasoline cars with an engine compression ratio above 11.6.
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