No plans for production, sadly, but Citroën showed the C-Buggy concept at the Madrid motor show. It's powered by a four-pot 1.6 that delivers its 155bhp at 8000rpm, has four-wheel drive and weighs just 850kg.<br/>
400bhp-plus, naturally aspirated V8s in humble saloons and estate cars were once almost common. Twenty years on is Audi's RS4, BMW's M3, Mercedes-AMG'…