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XC90 Twin Engine
Volvo's Twin Engine combines an internal combustion engine that drives the front wheels with an electric motor that drives the rear wheels.
Starting and stopping the combustion engine in Twin Engine
An advanced control system determines the extent to which the car is driven on internal combustion engine, electric motor or both in parallel. During electric operation, the car may sometimes need to start the internal combustion engine automatically due to external circumstances, e.g. in low outside temperatures, which is completely normal. In addition, the internal combustion engine always starts when the hybrid battery reaches its lowest state of charge.
Selection of drive mode affects the car's driving characteristics in order to enhance the driving experience and facilitate driving in special situations.