Squeezing powerful engines into small Renaults isn’t a new idea. Just look at the amazing Clio V6, with its 255bhp 6-cylinder in place of the rear seats, and the original wide-bodied Renault 5 Turbo that introduced a 115bhp turbocharged engine to the lightweight hatchback. So what would you do with a Mk1 Twingo? Stick a turbo 2-litre under the bonnet? See...