Perhaps the easiest way to demonstrate the extent to which emissions equipment and low-octane unleaded fuel had impacted the power output of new-vehicle engines is to note the following: The most powerful engine available from AMC–the 360-cubic-inch V8–was good for just 140 horsepower.  Meanwhile, AMC’s 304-inch V8 had been emasculated to just 120 horsepower. Still, … Continue reading 5 Most-Powerful American Cars of 1977