Desktop dyno.............

My opinion, which maybe wrong, is that the 2800 lb. car would have .16 lbs./horsepower and the 3600 lb. car would have .15 lbs./hp making the heavier car slightly faster in the 1/4 but maybe losing in the 1/8th. or at least for the first 3/4 of the 1/8th., not figuring in gearing etc. ???