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BMW M328

FieldValue
nameBMW M328 engine
imageBMW 328 6-Zylinder-Motor.jpg
production1936–1940
configurationStraight-6
valvetrainOHV
fueltypePetrol
blockAluminium
headAluminium
displacement1971 cc
bore66 mm
stroke96 mm
predecessorBMW M78
successorBMW M335

The BMW M328 is an overhead valve straight-six petrol internal combustion engine which was produced from 1936 to 1940. It was a high-performance development of the BMW M78 engine, and was produced alongside the M78.

Unlike with the M78, the M328 has an aluminium cross-flow cylinder head with hemispherical combustion chambers.

The M328 was used in the BMW 328 and BMW 327/28 coupes.

After World War II the engine was also licensed to Bristol Cars in the United Kingdom.

TOC

Design

The M328 has an unusual valvetrain design. The single camshaft is mounted low on the side of the engine block, and drives a rocker shaft on the intake side of the cylinder head through a set of vertical pushrods. A second set of horizontal pushrods run in tubes across the cylinder head to another rocker shaft on the exhaust side of the head. This results in a valve layout similar to a DOHC engine.

With a bore of 66 mm and a stroke of 96 mm, displacement is 1971 cc; the same as its M78 predecessor. Fuel is supplied via three Solex 30 JF downdraught carburettors.

The M328 engine has a compression ratio of 7.5:1 and produces 59 kW at 5000 rpm.

Versions

VersionDisplacementPowerTorqueYears
M3281971 cc59 kW
at 5000 rpm126 Nm
at 4000 rpm1936–1940

Applications:

  • 1936–1940 328
  • 1937–1940 327/28
  • 1947–1950 HH

References

Notes

Bibliography

References

  1. "BMW World - 6-Cylinder Engines".
  2. "1937 BMW 328".
  3. "BMW 328 - the legendary roadster".
  4. "1937 BMW 328".
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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