McLaren claims its new open - top 570S matches its coupe - bodied counterpart when it comes to performance, despite a 46 kg weight penalty due to the folding hard - top.
That's an objectively good number, but it's difficult to say if it's worth the extra cost: when the plug - in battery is depleted and the Energi runs in hybrid mode, it averages 4 fewer mpg than the Hybrid, due to its 259 - pound weightpenalty.