These two Bentley Mulsanne models are two variations of the same model with one major difference, the modifications. First of all, there is a notable difference in the starting price of the 2017 Bentley Mulsanne, which is $30,930 less than the base MSRP of the 2017 Bentley Mulsanne Speed. Also, the 2017 Mulsanne produces fewer horsepower than the 2017 Mulsanne Speed. Among similarities are the body structure, market segment, fuel economy, ground shadow size, height, and maximum occupancy.