BMW M21

BMW M21
Overview
ManufacturerBMW Motoren GmbH Steyr
Production1983–1991
Layout
ConfigurationStraight-6
Displacement2.4 L (2,443 cc)
Cylinder bore80 mm (3.15 in)
Piston stroke81 mm (3.19 in)
Cylinder block materialCast iron
ValvetrainSOHC 2 valves x cyl.
Compression ratio22.0:1
Combustion
Operating principleDiesel
TurbochargerGarrett T03 ('td' versions),
None ('d' versions)
Fuel systemSwirl chamber injection, distributor fuel injection pump
Fuel typeDiesel fuel 45 CN (DIN 51601)
Cooling systemWater-cooled
Output
Power output63–85 kW (84–114 hp)
Torque output152–220 N⋅m (112–162 lb⋅ft)
Chronology
PredecessorNone
SuccessorM51

The BMW M21 is a straight-six diesel engine developed by the German engine manufacturer BMW. It has swirl chamber injection and is based on the M20 petrol engine[1] and was produced for BMW by the Upper Austrian Steyr engine plant from 1983 to 1991. It was succeeded by the M51.[2]

  1. ^ Cite error: The named reference Bimmer was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Ran When Parked was invoked but never defined (see the help page).