I wonder what a normally aspirated diesel with modern technology could do.
I think the last one available was the SDI Golf. It produced 75 BHP from 1.9 liter, ECE was 5.4 liter, The 90 BHP TDi did 5.1....
"I find the whole business of religion profoundly interesting, but it does mystify me that otherwise intelligent people take it seriously." Douglas Adams