And, for comparison, “ A 4-stroke engine with one litre displacement operating for 60 minutes at 2500 rpm is estimated to consume 1 L x 2500/2 rpm x 60 minutes/

And, for comparison, “ A 4-stroke engine with one litre displacement operating for 60 minutes at 2500 rpm is estimated to consume 1 L x 2500/2 rpm x 60 minutes/hour = 75,000 litres of air.” https://collaboration.cmc.ec.gc.ca/science/rpn/SEM/dossiers/2006/seminaires/2006-04-07/AirVolumes_CMOSBULLETINSCMO_latest.pdf https://collaboration.cmc.ec.gc.ca/science/rpn/SEM/dossiers/...