Although the Honda Civic weighs less than the Mazda, has a smaller 143 - hp 1.8 - liter engine compared to the Mazda's 184 - hp 2.5 - liter, and uses an efficient continuously variable transmission rather than the Mazda's conventional automatic, it drank almost the exact same amount of fuel. (automobilemag.com)
Six cylinder 4.0 engine is not economical, burns same amount of fuel or less than a GM eight cylinder Vortex 5.3. (truecar.com)
Diesel engines have a higher compression ratio than gasoline ones do, and more compression means more power out of the same amount of fuel, she said. (scientificamerican.com)