Wow, so much misinformation.
944 S2 - 208bhp 3.0L
968 (NA) - 240bhp 3.0L
The F20c held the record for power/liter for a production engine for a long time, 1999-2005 I believe. Currently, only the F22c is produced which is less hp/L and now Porsche has the GT3 at 415bhp or something, which slightly edged out the F20c, but that was only introduced in 2006 I believe.