Thanks to a corporate tie-up with shareholder Daimler, the Aston Martin DB11 can now be had with a 4.0-litre twin-turbocharged V8 engine made by Mercedes-AMG. Subscribe now: http://smarturl.it/autocar The slightly cheaper alternative to the DB11 V12 produces 503bhp and costs £13,000 less than its sibling in the UK, but it's also been developed to appeal to more sporting tastes than the twelve-cylinder model, having stiffer suspension settings, stiffer mountings, retuned steering - and weighing 1