To amplify my previous post:
Since 1990 a massive amount of engineering and design talent has gone toward creating ever more powerful vehicles, which also tend to be heavier than in the 1980s. I recall well that in the late 1970s-early 1980s, a 0-60 mph time of 10 seconds was quick, and only the most powerful cars of the time were significantly faster. Now 10 seconds is considered bog slow. Also, everyday cars that could exceed 110 mph, "double the double nickel" (55 mph), were so uncommon that Car and Driver had a cover story in 1977 about testing the few there were. Now there are dozens of cars in the US market capable of 150+ mph, which is totally irrelevant when the highest posted speed limit is 80 mph on some Texas interstates and there seems to be general agreement that even higher speed limits are out of the question. To a great degree, we are living in an automotive renaissance, but it has come at a large energy cost.
The automakers, foreign as well as American, concentrated on power, not economy. This was horribly misguided. That same engineering talent could and should have been used to create economical transportation alternatives and alternative engines and fuels. It isn't too late, or so I hope, but we have much less time. A sedan or wagon that can seat a family comfortably and get, say, 75 mpg (with acceptable performance and a minimum of complexity) is exactly what we need, not yet another 200-mph supercar, 500-hp sedan, 3-ton SUV, or bling-bling 10-mpg pickup that will never haul a load. Making the effort in economical alternatives to today's transport mix is what's best for America.