Actual speed depends on a lot of different variables. LBH is both right and wrong depending on the length and weight of the boat, hull style, number of batteries used, weight of contents of the boat, type of trolling motor etc. I have done speed tests on different boats to help myself as well as some buddys decide how to set up boats. From research and actual tests this is what I have found to be the facts. Each boat has a hull speed which is the fastest theoretical speed that a boat can achieve with out getting on plane. To get this speed you multiply the hull length by a number (which I cant recall right now). I do know that a 14 foot boat can reach a hull speed of around 5mph and a 16 foot boat can reach around 6mph. But you also have to keep in mind the other variables such as a v-hull will be faster than a flat bottom jonboat and two 50 lb motors will not be faster than one 82lb thrust motor since the pitch of the props are different and the motors put out different RPMs. With all that being said I could give different situations and give you close to the best way to set it up. But back to the LBH comment. If you put two 16 foot semi-v hull boats with six group 29 batteries going down the lake side by side and one has three 82lb motors and the other has four the one with four will be faster. I know this because in our first tournament this year we were running side by side for about 3/4 of a mile with a boat that was set up with six batteries and three 82lb motors. We turned our fourth motor on and slowly but steadily pulled away from them so they couldnt get the spot we were going to. For the recreational angler that extra motor is really probably a waste of money but if you need to beat someone to a spot two miles away its a big difference. I have also done the GPS and the extra motor made a difference of around one mph. It was a difference between five and six mph. If you didnt have another boat right next to you or have a gps you wouldnt know the difference. There is a big difference between two and three motors though and you can tell the difference.