The 3800 is the last engine series in a long line of Buick V6s that dates back to 1961. The most popular versions of the 3800 were the series II and series III motors produced from 1996 - 2009.
It is a 3.8 liter V6 engine utilizing pushrods for its 2 valves per cylinder. The 3800 was offered in naturally aspirated as well as supercharged configurations.

This link from Wikipedia details the history of the Buick V6 as well as information about what cars it was available in.
https://en.wikipedia.org/wiki/Buick_V6_engine


Series 2/3 technical specifications and other info:

Displacement3.8 liters (231 in3)
Factory Power output205 - 260 hp
Factory Torque output230lb-ft - 280 lb-ft
Bore3.8“
Stroke3.4”
Block MaterialCast Iron
Head MaterialCast Iron
valves12 valves (2 per cylinder)
Firing Order1-6-5-4-3-2
factory oil capacity4.5 quarts
bellhousing pattern60 degree Chevy pattern
Distance from crank center to top of intake18“
Distance from crank center to bottom of oil pan9”
Distance from bellhousing flange to end of balancer21“
Engine Weight392 lbs (L36), ~450 lbs (L67)
# of main cap bolts2 + 2 cross-bolts
liftershydraulic roller




Overview of each version:

pre-series 1 N/A series 1 N/A Series 1 Supercharged Series 2 N/A Series 2 Supercharged Series 3 N/A Series 3 Supercharged
Years Produced1988-19911991-19951991-19951995-20041995-20042004-20092004-2009
RPO CodeLN3L27L67L36L67L26L32
Vin CodeCL1K124
Horsepower165 @ 5200170 @ 5200205 @ 4400 (93-), 225 @ 5000 (94+)205 @ 5200240 @ 5200205 @ 5200260 @ 5400
Torque210 @ 2000220 @ 2000260 @ 2800 (93-), 275 @ 3200 (94+)230 @ 4000280 @ 3600230 @ 4000280 @ 3600
Compression Ratio8.5:19.0:18.5:19.4:18.5:19.4:18.5:1
Aspiration MethodNaturally AspiratedNaturally AspiratedM62 SuperchargerNaturally AspiratedM90 Supercharger gen 3Naturally AspiratedM90 Supercharger gen 5
Fuel Injectors19 lb/hr22 lb/hr28 lb/hr22 lb/hr36 lb/hr22 lb/hr33 lb/hr

source: gmtuners.com