When it comes to the XC90 range's mild hybrid 'B5' petrol and diesel engines, most buyers will prefer the 235hp diesel unit over the 250hp petrol version, but either way, the drivetrain set-up is the same, based around a 48-volt battery, a 'KERS' kinetic energy recovery system and an 'ISG' integrated starter-generator. Every time you brake or take your foot from the throttle, the 'KERS' set-up captures surplus energy and stores it as electricity in an extra battery provided in the boot. That additional electricity can be used to boost acceleration, help the stop/start system or power ancillary functions. The objective here wasn't to provide Prius-like periods of electric-only driving but instead make the engine more efficient via smoother transitions between driving, cruising and resting. That's all been aided by revisions to the automatic gearbox and the implementation of the brand's first brake-by-wire system.
As before, across the range, there's the option of an 'Active Four-C Chassis' package, which gives you four-corner adaptive dampers and electronic air suspension. Handling strikes a good balance between comfort and agility; cruising refinement meets the required executive standard; and there's the potential for a mild amount of off road prowess. A standard 'Pilot Assist' system offers a degree of highway-orientated autonomous driving technology. And you might be interested to know this car can tow up to 2,700kgs.