Chapter 5 chart Historic development of new passenger car engine power vs. engine displacement (“specific power”)

Today’s vehicle models are much heavier than their predecessors. The Fiat 500 today, for example, weighs twice as much as the same vehicle model sold in the 1960s and 1970s. Underlying reasons include the fact that modern vehicles have more safety but also entertainment equipment on board. The size of vehicle models has also increased over time, however to a lesser degree than weight.