Editing Buick V6 engine (section)

==== {{anchor|L27}} L27 SI Naturally Aspirated ====

[[File:3800II L36.JPG|thumb|A 3800 Series I L27 naturally aspirated engine installed transversely in a 1995 [[Buick Regal]].]]

The LN3 was replaced by the {{cvt|3791|cc|L cuin|1}} '''L27''' in mid-1990 and produces {{cvt|170|hp|kW|0}}. The slight power increase was accompanied by more torque in the mid-range, all thanks to a new, two-piece intake manifold with longer runners. Other improvements over the LN3 included wider [[connecting rod]] bearings, a new [[timing chain]] tensioner, dual-wall exhaust pipes, new heat shields for the exhaust manifolds, and sound absorbing, composite molded valve covers.<ref name=WAW260475>{{cite journal | journal = Ward's Auto World | volume = 26 | number = 4 | publisher = Ward's Communications | date = April 1990 | page = 75 | title = Park Avenue gets electronic transaxle | first = Joel D. | last = Pietrangelo }}</ref> This engine is referred to as the Series I 3800, or 3800 TPI (Tuned Port Injection).

In Australia, the LN3 was also replaced by the L27 by Holden who used the engine in their series 2 (1991) VN Commodore range. However, the Australian L27 retained the LN3's one piece upper intake and lower plenum. Power was still boosted to {{cvt|127|kW|hp|0}} for the Holden L27, before being boosted to {{cvt|130|kW|PS hp|0}} in the revised VR Commodore in 1993. The L36 made its debut in 1995.

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* 1992–1995 [[Buick LeSabre]]
* 1991–1994 [[Buick Park Avenue]]
* 1991 [[Buick Reatta]]
* 1990–1995 [[Buick Regal]]
* 1991–1993 [[Buick Riviera]]
* 1992–1995 [[Chevrolet Lumina APV]]
* 1991–1995 [[Holden Commodore]] ([[Holden VN Commodore|VNII]], [[Holden VP Commodore|VP]], [[Holden VR Commodore|VR]])
* [[Holden Caprice]] ([[Holden VQ Statesman|VQ]], [[Holden VR Statesman|VR]])
* 1992–1994 [[Pontiac Bonneville]]
* 1992–1995 [[Pontiac Trans Sport]]
* 1992–1994 [[Oldsmobile Eighty-Eight]]
* 1992–1994 [[Oldsmobile Ninety-Eight]]
* 1991–1992 [[Oldsmobile Toronado]]
* 1991–1992 [[Oldsmobile Toronado Trofeo]]
* 1992–1995 [[Oldsmobile Silhouette]]
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[[Image:95RivEngine.jpg|thumb|A [[supercharged]] 3800 (transverse mount) installed in a [[Buick Riviera]] for 1995, the last year of Series I L67 production. Power is {{cvt|225|hp|0}}/{{cvt|275|lbft|Nm|0}} for this version.]]