The new RS6 Plus isn't fooling around. The wicked-exclusive wagon (only 999 will be produced) keeps the same twin-turbo V8 as the RS6, but electronic management has extracted a further 30-hp, plus two more water radiators have been fitted to aid in cooling duties. The exhaust is also tweaked to provide a broader powerband, and the suspension is slightly firmer and ride height lowered by 10mm. The car is impossibly well-mannered, and getting into trouble is quite difficult, although with the electronic speed limiter bumped up to 175 mph, what trouble you do get into could be quite costly indeed. And speaking of cost, the RS6 Plus will drain about £67,000 from UK wallets.