I recently put the new Lamborghini Temerario on the weighbridge at MIRA. It had the Alleggerita pack fitted, which for a trifling £37k saves you about the mass of a Labrador.

Up popped the numbers, one for each corner. I always double-check these green digits as they go in my notebook, but this time was compelled to triple-check. At the facility that houses the weighbridge works an engineer with whom I play guess the weight for every test car. We squinted at the numbers solemnly. Both of us were frankly miles off, more on which in a moment. In the meantime, have a punt yourself.