Editing Quad 4 engine (section)

==== W41 ====
[[File:W41engine.jpg|thumb|right|A 2.3-liter Quad&nbsp;4 W41 engine]]
The W41 was the most powerful Quad&nbsp;4. The 1991–1992 W41s were rated at {{cvt|190|hp|kW|0}}, while the 1993 W41 was rated at {{cvt|185|hp|kW|0}} as a result of the first round of exhaust port size reduction to improve emissions and other changes to the Quad&nbsp;4 architecture to reduce NVH. The additional {{cvt|10|hp|kW|0}} came from longer duration cams and a different [[Engine control unit|PROM]].

Part of the W41 drivetrain was a specific version of the HM-282/NVG-T550 with a gear set otherwise unavailable. All W41 five-speed transmissions had a final drive ratio (FDR) of 3.94:1 whereas the 1988–1992½ LD2 and LG0 transmissions all used a 3.61:1 FDR; the 3.94:1 FDR was used on all 1992½–1994 LG0 transmissions, but retained the standard HM-282/NVG-T550 gear set.

W41 applications:
* 1991 [[Oldsmobile Cutlass Calais]]
* 1992–1993 [[Oldsmobile Achieva]] SCX
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