What was the Earliest Production Car to Reach 100 HP/Liter?

Specific Output (that is, the amount of power produced relative to its displacement) is one of many metrics used to compare the performance of an engine. The holy grail, at least for naturally aspriated engines, is to produce over 100 horsepower per liter (100 hp/liter). I was reminded of the 1968 Subaru 360 Young SS,… »Today 8:45pm11/30/15 8:45pm