Gas Versus Diesel Comparison By Brand - 7% Grade with Trailer
This page is an opportunity to compare the relative performance of the single rear wheel gas pickups against their dual rear wheel diesel counterparts on the 7% grade.
Obviously, not an apples to apples comparison (primarily because of weight and rear axle and rear track differences between the 3/4-ton and 1-tons), but it provides some indication of the scenarios where each type of engine excels. You can see the patterns from manufacturer to manufacturer are almost identical, regardless of the truck / engine / transmission combinations.
Again, as we noted during the level 1/4-miles at Milan and MPG, look at how close the time and speed curves are for the Ford trucks. They were near identical up the 7% grade. In contrast to the Dodge and GM oil burners, the 6.8-liter V10 gas engine was faster moving up the grade than the 6.4-liter V8 diesel.