The new Volvo S90 saloon and V90 estate are now available with performance upgrade packages from in-house tuning specialists Polestar.

The Polestar Performance Package is initially offered for the D5 PowerPulse diesel engine, and the upgrade increases engine output from 235hp and 480Nm to 240hp and 500Nm.

Peak torque is also available across a wider rev range of 1,500-2,500 rpm, compared to the standard car’s 1,750-2,250 rpm.

The package costs £835, but Polestar claims it upgrades not just engine performance but also throttle response and gear-shift speed.

Emissions, fuel consumption and service intervals remain unchanged, and the vehicle’s original warranty is unaffected.