Costs & verdict
Everyday costs, plus how reliable and safe it is
It will probably come as no great surprise that the xDrive30d diesel has the best official fuel economy, and the M Competition petrol the worst. An official figure of 42.8mpg for the former compares well against 33.6mpg for the equivalent Audi Q8, but CO2 emissions of 172g/km mean the X6 still still falls well within the top benefit-in-kind (BIK) tax band.
More positively, even entry-level Sport models are stacked with kit, including 19in alloy wheels and heated front seats. M Sport trim is only a small jump up in price, though, and comes with 21in alloy wheels, black exterior trim highlights, a more aggressive body kit, an M Sport braking system and a sports steering wheel. No wonder M Sport accounts for the vast majority of sales. There's a long list of optional comfort, convenience and technology packs, too, but – as is the case with the X6's rivals – these can add a big chunk to the bottom line.
