Cars are so much better than the government had intended that one can only imagine how good they might have been had the government not been involved at all.
In the first place, the government meant for most of us (but not them) to be driving small cars with not much power. This was the purpose of Corporate Average Fuel Economy requirements, which first went into effect back in the 1970s.
And initially, it worked exactly as intended.
Cars got “downsized” across the board. The typical layout of the American family car went from rear-wheel-drive with a V8 engine up front to front-wheel-drive with a four-cylinder engine parked on top of the front wheels. Cars shed horsepower and engine displacement as well as curb weight, as the engineers groped for more MPGs. Instead of 4,000-pound Impalas with 5.7 liter 350s (and 7.4 liter 454s) under their hoods, Americans found themselves driving 2,800 lb. pound K-cars with 2.6 liter “hemi” fours.
Then something marvelous happened.
As a side effect of the quest for Ever More Efficient, engine power began to swell again. Things like roller (rather than flat tappet) camshafts allowed more aggressive valve timing without costing gas or drivability. Cylinder heads – which were increasingly being made out of aluminum rather than cast iron – flowed more air, which made more power. Carburetors were replaced by electronic fuel injection.
All of these things – which are now standard equipment in economy cars – were once exotic technologies used in race cars or very expensive high-performance cars.
We began to have our cake – while Uncle had his, too.
The upswell in power – and performance – continues to this day. Current year family sedans are quicker than most muscle cars…