Today's technology allows manufacturers to make small cars more fuel-efficient now than at any time in their production history
Today's technology allows manufacturers to make small cars that are more fuel-efficient than those at any other time in production history
What's wrong with sentence 1? (sentence two is correct)
Today's technology allows manufacturers to make small cars that are more fuel-efficient than those at any other time in production history
What's wrong with sentence 1? (sentence two is correct)

















