The document lists vehicle models from various manufacturers (Audi, Citroën, Fiat, Ford, GM) along with their engine specifications including displacement, valves, fuel system and power output. It includes models from Audi, Citroën, Fiat, Ford, and GM from 1992 to 2018 with 1.0 to 6.2 liter gasoline, ethanol flexible fuel, and natural gas engines. The Fiat section is the longest and most detailed, listing over 60 Fiat models and their corresponding engines.