Aston Martin DBX 707 vs Porsche Cayenne Turbo GT: costs

These two musclebound monsters sit at the very top of the sports SUV tree, but which is the king of the jungle?...

New Aston Martin DBX 707 panning

Buying and owning

Costs, equipment, reliability, safety and security

The Aston Martin DBX costs a huge £39,500 more than the Porsche Cayenne to buy, making the latter look pretty good value in this company. However, over the course of three years of ownership, the cost gulf between the two will shrink quite dramatically.

That's because the DBX is set to lose its value at a much slower rate than the Cayenne, so you'll get a greater proportion of your money back when you come to sell it on. Factor in running costs and your three-year DBX experience will cost just £8319 more than spending that time with the Cayenne.

New Porsche Cayenne Turbo GT panning

Speaking of running costs, V8-powered SUVs are always going to be financially demanding, and both of these return around 20mpg in real-world use. Insurance and servicing costs are steep, too, with the DBX being particularly pricey when it comes to the latter.

We also seriously doubt that anyone will purchase their Cayenne without adding a long list of options. While it has all the driver-focused tech you might want as standard, it doesn’t come with keyless entry (£816), soft-close doors (£497), adaptive cruise control (£1203) or wireless smartphone charging (£413). The DBX gets all of that kit as standard.

We should also mention that the DBX offers much more scope for personalisation. If you’re extremely well heeled, Aston Martin’s Q department will let you create your own, bespoke specification. For example, our DBX test car was finished in special Satin Titanium Grey paint (for a huge £10,400) and features a £3280 carbonfibre interior trim pack.

New Aston Martin DBX 707 vs New Porsche Cayenne Turbo GT costs

When it comes to safety, the Cayenne was awarded the full five stars from Euro NCAP but the DBX hasn’t been crash tested due to its limited production numbers. However, the DBX gets far more safety kit as standard. Both cars have automatic emergency braking but Porsche Cayenne buyers have to pay extra for lane-keeping assistance (£783), blind-spot monitoring (£548) and traffic-sign recognition (£783).

The Aston Martin DBX comes with all this kit and adds a rear cross-traffic alert system to prevent you from reversing into the path of vehicles passing behind you, plus a system that warns you against opening the doors into the path of cyclists as they pass.

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