Combustion technology has also been favoring power over efficiency for at least the last 20 years. It turns out that once you get the car up to about 35 MPG, a

Combustion technology has also been favoring power over efficiency for at least the last 20 years. It turns out that once you get the car up to about 35 MPG, above that nobody really cares, statistically speaking. Specific power meanwhile has skyrocketed. You can now buy a 1000cc normally-aspirated engine that makes 200 horsepower.