This new Aston Martin DBX707 is the most powerful SUV on sale in the UK, and its very existence speaks volumes for the evolving nature of the relationship between the company and its ‘technical partner’ Mercedes-AMG. When Aston Martin first started putting AMG engines in the Vantage it was given entry-level specification versions of the 4-litre V8 and other than modifications required to put it in the Vantage, was told not to touch it at all. At the time AMG’s boss was one Tobias Moers who, rumour has it, had once been quite keen on running Aston Martin
