Volvo Redblock Engine

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Volvo Redblock Engine
B21 engine
Overview
Manufacturer	Volvo Cars
Production	1974–1998
Layout
Configuration	Inline-four
Displacement	1.8–2.3 L (1,784–2,316 cc)
Cylinder bore	88.9 mm (3.50 in) 92 mm (3.62 in) 96 mm (3.78 in)
Piston stroke	71.85 mm (2.83 in) 80 mm (3.15 in) 86 mm (3.39 in)
Cylinder block material	Cast iron
Cylinder head material	Aluminium
Valvetrain	SOHC 2 valves x cyl. DOHC 4 valves x cyl.
Compression ratio	7.5:1, 8.7:1, 9.3:1, 9.5:1, 9.8:1, 10.0:1, 10.5:1, 10.7:1
Combustion
Turbocharger	Garrett T3 with intercooler Mitsubishi TD04H-13C with intercooler (Select models)
Fuel system	Pierburg, SU, Solex-Cisac or Zenith-Stromberg carburettors Electronic fuel injection Mechanical fuel injection
Management	Bosch K-Jetronic, LH Jetronic, LE Jetronic or Motronic
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water cooling
Output
Power output	90–200 hp (67–149 kW)
Torque output	157–290 N⋅m (116–214 lb⋅ft)
Emissions
Emissions control systems	EGR, Pulse air system, Catalytic converter, O2 sensor
Chronology
Predecessor	Volvo B20
Successor	Volvo Modular engine

The Volvo B21 is a slanted straight-four engine first used in the Volvo 200 series, meant to replace the B20. The B21 and all derived engines are often referred to as red block engines for the red paint applied to the block. The primary differences when compared to the B20 was the switch to a SOHC in place of the older pushrod configuration, and an aluminum crossflow cylinder head versus the iron head of the B20.