Volvo's flagship SUV in the range-topping T8 version runs to 62 mph (100 kph) in five and a half seconds.

It was only last week when Polestar upgraded the D5 diesel engine of the S90 and V90 and now time has come for the XC90 to get a bump in output. The model of choice is the flagship T8 Twin Engine which in standard configuration puts out a combined 400 horsepower (298 kilowatts) and 472 pound-feet (640 newton meters) of torque thanks to the turbocharged and supercharged 2.0-liter, four-cylinder engine working together with an electric motor.

After applying its expertise, Polestar managed to bump those output numbers to a combined 421 hp (314 kW) and 502 lb-ft (680 Nm). The combustion engine now generates 334 hp (249 kW) and 324 lb-ft (440 Nm) whereas the electric motor is good enough for 87 hp (65 kW) and 177 lb-ft (240 Nm). With the power hike implemented, the Polestar-tuned XC90 T8 Twin Engine will run to 62 mph (100 kph) in only 5.5 seconds while retaining the same combined fuel consumption of just 2.1 liters / 100 km and the 43-km electric range.

Aside from giving the T8 Twin Engine setup more hybrid muscle, Polestar also improved throttle response and optimized the gear hold function which now keeps the selected gear during cornering at high lateral g-forces. It means there won’t be any unwanted gear shifts while the hybridized SUV is cornering and this should enable a sportier driving experience.

Polestar’s optimization for the XC90 T8 is now available in Europe and Volvo says it has plans for a U.S. launch this October. Don't hold your breath for an engine with six or more cylinders, as Volvo has made it clear it is taking the downsizing path, so the strongest Volvos will continue to have a four-cylinder combustion engine.

Source: Volvo

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