Volvo will be bringing its 48-volt mild-hybrid powertrains, the B5 and B6, to the U.S. 2022 S60, S90, XC60, and V90. The hybrid powertrain will result in increased fuel efficiency but decreased horsepower. The B5 powertrain features a turbocharged 4L inline-4 engine, and the B6 features a turbocharged and supercharged 4L inline-4 engine.Read more