A day with the crazy Peugeot Onyx

Before you get too disappointed, remember that this car only weighs 1,100kg, so the Onyx has a power-to-weight ratio of 545bhp per tonne. Which is a lot - even a car as ballistic as the Ferrari F12 can only manage 448bhp per tonne. In fact, you've got to be in something like the Bugatti Veyron Super Sport to beat the Peugeot's power to weight, so the Onyx is in rarefied company.

The low kerbweight is mainly thanks to the 12-piece carbon-fibre chassis, which only weighs 100kg and helps to counteract the more unusual - and heavier - copper body panels. Incidentally, these are being left untreated, the theory being that the Onyx will ‘age' as the copper oxidises and turns verdigris green.