Exactly! Drivetrain type is completely orthogonal to weight as a performance factor for a vehicle. Weight will affect the efficiency of every drivetrain (unle

Exactly! Drivetrain type is completely orthogonal to weight as a performance factor for a vehicle. Weight will affect the efficiency of every drivetrain (unless you have a drivetrain that can zero out the inertial properties of nearby mass). I was only suggesting that luxury is a less important factor than weight to consider for efficiency.