The Swedish brand's in-house tuner increases mid-range muscle for easier highway passing.

Polestar’s Performance Optimization program aims to give owners extra grunt from the D5 diesel engine in the new Volvo S90 sedan and V90 wagon. The package focuses only on drivetrain upgrades unlike the complete transformation for the S60 and V60 Polestar. However, limiting the scope of the improvements lets Volvo keep the updates fairly affordable.

The Polestar Performance Optimization pushes the D5 2.0-liter biturbo diesel four-cylinder to 240 horsepower and 369 pound-feet of torque. While only a modest upgrade from the stock 235 hp and 354 lb-ft, Volvo claims the upgrades put an emphasis on drivability in the middle of the rev range rather than on outright power. After a dealer installs the package, buyers should also feel better throttle response, quicker shifts from the automatic gearbox, and the transmission would hold gears longer during acceleration.

The mods also knock a tenth of a second off each model’s sprint to 62 miles per hour, which brings the S90 to 6.9 seconds and the V90 to 7.0 seconds. The changes don’t affect fuel economy or emissions, though.

The Polestar Performance Optimization is available in markets throughout Europe, Asia, and Africa. Customers in North America can’t get it, though, because the D5 isn’t available there. Prices vary by country. For example, the package costs 830 pounds ($1,210), including installation and tax, in the United Kingdom. In October, Polestar will roll out a similar package for the T5 gasoline-fueled 2.0-liter turbo four-cylinder, which will bring extra power to that powertrain too.

Source: Polestar


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