http://en.wikipedia.org/wiki/Oldsmobile_V8_engine#307
The V6 3.1L has 140HP
The 1985 Buick Regal did not offer the 305 V8 as an option that year.
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The 2003 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2011 Buick Regal's engine produces 172 ft-lbs. @ 4900 rpm.
The 2013 Buick Regal's engine produces 172 ft-lbs. @ 4900 rpm.
The 2004 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2002 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2001 Buick Regal's engine produces 225 ft-lbs. @ 4000 rpm.
The 2012 Buick Regal's engine produces 172 ft-lbs. @ 4900 rpm.
The 2014 Buick Regal's engine produces 295 ft-lbs. @ 3000 rpm.