Here's the reason Chrysler gave for the 440 HP and yes warranty, daily drivability, reliability, torque, etc., were the reasons. Where or at what RPM the torque was made went right along with what an engine design engineer once told me: "You don't drive an engine on the horsepower, you drive an engine on the torque". So true, as seen on page 2 with the standard 440 making the same amount of torque of 480 lb/ft at 2800 rpm or at 400 rpm lower than the 440 HP, great for towing or moving a large, heavy vehicle down the road. IMO Torque is KING.