[rsynnott]

Hrm. So if you take the Cadillac Series 70 (which would have been seen in its lifetime as a very large car; they tended to be used as head-of-state limos and that sort of thing), it was about 2 tonnes for most of its lifetime and peaked at about 2.5 tonnes. More normal full-size sedans were well under 2 tonnes. An F150 is 2.1 tonnes for the non-electric version. A cybertruck is 3 tonnes.

Cars definitely did get smaller in the 80s, but they’ve been getting bigger again for a while. 70s cars did indeed have bigger engines, but they weren’t very efficient engines.