Thanks to Mark for lending us his cars: @MarkMcCann64 Thanks to Garage WhifBitz for hosting this video: Have you ever wondered just how accurate Lamborghini’s claimed power output figures are? Well, we’re about to put them to the test!We’ve got our hands on a Lamborghini Huracan STO, an Aventador SVJ and an Urus Performante, and we’re heading to the dyno to see just how accurate their horsepower figures are!Each of these three supercars comes equipped with a different engine & power output. The Huracan STO is first up, and it arrives with a 5.2-litre naturally-aspirated V10 which can apparently produce 640hp. Following that we have the Urus Performante, which is packing a 4-litre twin-turbo V8 that can pull 666hp. And then finally we have the daddy, the Aventador SVJ. This is packing a 6.5-litre V12 which can apparently put down 770hp. Or at least, that's what Lamborghini claims...But that’s not all! As well as finding out what their power output figures are, we’ll also be sticking each car on the scales to find out how much they really weigh! How do you think this one will play out - will the cars be putting down what Lamborghini says they are? And will they be lighter or heavier than their claimed weight?! You’ll need to stick with Mat and Mark to see for yourself!Sell your car with carwow: We've approached Lamborghini to comment on the weight discrepancy and are waiting for its response