Editing Quad 4 engine (section)

{{short description|Inline four-cylinder automobile engine}}
{{original research|date=April 2021}}
{{Infobox automobile engine
| name          = Oldsmobile Quad&nbsp;4
| image         = Quad4Engine.jpg
| caption       = 
| manufacturer  = [[Oldsmobile]] division of [[General Motors|GM]]
| aka           = Quad OHC<br />Twin Cam
| production    = 1987–2002
| predecessor   = 
| successor     = [[L850 engine|Ecotec engine]]
| configuration = [[Straight-four engine|I4]]
| displacement  = {{ubl |{{cvt|2260|cc|cuin|1}}|{{cvt|2392|cc|cuin|1}}}}
| bore          = {{ubl |{{cvt|92|mm|in|2}}|{{cvt|90|mm|in|2}}}}
| stroke        = {{ubl |{{cvt|85|mm|in|2}}|{{cvt|94|mm|in}}}}
| block         = [[Cast iron]]
| head          = [[Aluminum]]
| valvetrain    = {{ubl |[[Dual overhead cam|DOHC]] [[Multi-valve#Four valves|4 valves per cyl.]]|[[Single overhead cam|SOHC]], 2 valves per cyl.}}
| compression   = 9.5:1, 9.7:1, 10.0:1
| fuelsystem    = [[Sequential multi-port fuel injection|Sequential MPFI]]
| turbocharger  = Experimental engines only
| fueltype      = [[Gasoline]]
| oilsystem     = [[Wet sump]]
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| power         = {{cvt|150–190|bhp|kW|0}}
| specpower     = 
| torque        = {{cvt|160|lbft|Nm|0}}
| length        = 
| width         = 
| height        = 
| weight        = 
}}

The '''Quad&nbsp;4''' is a family of [[straight-four engine]]s produced by [[General Motors]]' [[Oldsmobile]] division. Several [[Overhead camshaft engine#Dual overhead camshaft (DOHC)|double overhead camshaft]] (DOHC) versions were produced between 1987 and 2002, and one [[Overhead camshaft engine#Single overhead camshaft (SOHC)|single overhead camshaft]] (SOHC) model was built from 1992 to 1994.