BMC B-series engine

B-series engine
Overview
ManufacturerBMC
DesignerLeonard Lord, John Rix, Eric Bareham
Production1954–1986
Layout
ConfigurationInline-4 and Inline-6
Displacement
  • Inline-fours:
  • 1.2 L (1,199.6 cc)
  • 1.5 L (1,490 cc)
  • 1.6 L (1,588 cc)
  • 1.6 L (1,623 cc)
  • 1.8 L (1,762 cc)
  • 1.8 L (1,798 cc)
  • Inline-six:
  • 2.4 L (2,433 cc)
Cylinder bore
  • 65.5 mm (2.6 in)
  • 73 mm (2.9 in)
  • 75.4 mm (3.0 in)
  • 76.2 mm (3.0 in)
  • 80.2 mm (3.2 in)
Piston stroke89 mm (3.5 in)
Cylinder block materialCast iron
Cylinder head material
ValvetrainOHV, Twin-Cam
Compression ratio8.3:1-9.9:1
Combustion
Fuel systemSingle or twin carburettors
Fuel typePetrol & Diesel versions
Cooling systemWater-cooled
Output
Power output39–108 bhp (29–81 kW)
Torque output64 lb⋅ft (87 N⋅m)
Chronology
PredecessorBMC A-Series engine
Successor

The BMC B series is a line of straight-4 & straight-6 internal combustion engine mostly used in motor cars, created by British automotive manufacturer Austin Motor Company.

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