Quad 4 engine

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Oldsmobile Quad 4
Overview
Manufacturer	Oldsmobile division of GM
Also called	Quad OHC Twin Cam
Production	1987–2002
Layout
Configuration	I4
Displacement	2,260 cc (137.9 cu in) 2,392 cc (146.0 cu in)
Cylinder bore	92 mm (3.62 in) 90 mm (3.54 in)
Piston stroke	85 mm (3.35 in) 94 mm (3.7 in)
Cylinder block material	Cast iron
Cylinder head material	Aluminum
Valvetrain	DOHC 4 valves per cyl. SOHC, 2 valves per cyl.
Compression ratio	9.5:1, 9.7:1, 10.0:1
Combustion
Turbocharger	Experimental engines only
Fuel system	Sequential MPFI
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	150–190 bhp (112–142 kW)
Torque output	160 lb⋅ft (217 N⋅m)
Chronology
Successor	Ecotec engine

The Quad 4 is a family of straight-four engines produced by General Motors' Oldsmobile division. Several double overhead camshaft (DOHC) versions were produced between 1987 and 2002, and one single overhead camshaft (SOHC) model was built from 1992 to 1994.