Beware the quiet ones: Volvo's most powerful new sleeper hit packs a punch that will leave you breathless.

Twin-turbocharging and a sleeper sedan go together extremely well. From the outside, the car looks like any other mild-mannered sedan, but from the driver’s seat, the twin-turbocharged engine delivers ...

The sleeper cabs will consist of three pieces: a one-piece composite sleeper, a composite roof and Volvo’s highly engineered steel cab, modified to attach to the composite sleeper. Volvo Trucks North ...