Editing Saturn I4 engine (section)

{{distinguish|Mitsubishi Saturn engine}}
{{Refimprove|date=August 2013}}
{{Infobox automobile engine
| image = 1996 Saturn I4 engine (SOHC) 3.jpg
| name = Saturn engine
| aka = {{ubl |Single Cam|Twin Cam}}
| manufacturer = [[Saturn Corporation]]
| configuration = [[Straight-4]]
| bore = {{convert|82|mm|in|2|abbr=on}}
| stroke = {{convert|90|mm|in|2|abbr=on}}
| displacement = {{convert|1901|cc|L cuin|1|order=flip|abbr=on}}
| weight = {{ubl | SOHC: {{Convert|196.74|lb|abbr=on}}|DOHC: {{Convert|220.22|lb|abbr=on}}}}
| block = [[Aluminum]]
| head = [[Aluminum]]
| valvetrain = {{ubl | [[SOHC]] 2 valves x cyl.|[[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]]}}
| fuelsystem = {{ubl | [[Throttle-body fuel injection]]|[[Sequential multi-port fuel injection|Sequential MPFI]]}}
| fueltype = [[Gasoline]]
| oilsystem = [[Wet sump]]
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| power = {{ubl | LK0: {{convert|85|hp|kW|0|abbr=on}}|L24: {{convert|100|hp|kW|0|abbr=on}}|LL0: {{convert|124|hp|kW|0|abbr=on}}}}
| torque = {{ubl | LK0: {{convert|107|lbft|Nm|0|abbr=on}}|L24: {{convert|115|lbft|Nm|0|abbr=on}}|LL0: {{convert|122|lbft|Nm|0|abbr=on}}}}
| compression = {{ubl |SOHC: 9.3:1|DOHC: 9.5:1}}
| specpower = {{ubl | LK0: {{convert|{{#expr:85/1.901 round 1}}|hp|1|abbr=on}}/L|L24: {{convert|{{#expr:100/1.901 round 1}}|hp|1|abbr=on}}/L|LL0: {{convert|{{#expr:124/1.901 round 1}}|hp|1|abbr=on}}/L}}
| successor = [[L850 engine|Ecotec engine]] ([[de facto]])
}}
The powerplant used in [[Saturn S-Series]] automobiles was a [[straight-4]] aluminum piston engine produced by [[Saturn Corporation|Saturn]], a subsidiary of [[General Motors]]. The engine was only used in the Saturn S-series line of vehicles (SL, SC, SW) from 1991 through 2002. It was available in chain-driven [[SOHC]] or [[DOHC]] variants.

This was an innovative engine for the time using the [[lost foam casting]] process for the engine block and cylinder head. Saturn was one of the first to use this casting process in a full-scale high-production environment. Both engine types used the same engine block.