i know it takes more energy to accelerate a heavier car to the same speed as a light car, but what if they're both up to speed , wich will coast furter?
assuming they both have more or less the same tires and frontal area and Cd (in the example i'm thinking of the bigger car actually has a better Cd)
the weight difference is about 300 kg - 660lbs.
will weight effect rolling resistance, or won't this be a factor with the right tire pressure?
lunarhighway 
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