BMW M GmbH expanded its high-performance model line-up to include models in the mid-size Sports Activity Vehicle (SAV) and Sports Activity Coupe (SAC) segments for the first time. The BMW X3 M and BMW X4 M set the benchmark for dynamic excellence, agility and precision in their respective classes.br br Also new is the launch alongside the BMW X3 M and BMW X4 M of their Competition siblings. The BMW X3 M Competition and BMW X4 M Competition will capture customers' imagination with their extra power and exclusive appointments.br br The addition to the BMW M GmbH line-up of its first high-performance models in the mid-size Sports Activity Vehicle (SAV) and Sports Activity Coupe (SAC) segments also heralds the arrival of a newly developed sixcylinder in-line engine in two variants. The engine stands out with its familiar M high-revving character, the latest M TwinPower Turbo technology update, plus track-tested cooling and oil supply systems. It develops 353 kW480 hp in the BMW X3 M and BMW X4 M, and an even mightier 375 kW510 hp in the BMW X3 M Competition and BMW X4 M Competition.br br The standout performance characteristics of the 3.0-litre units are encapsulated by the linear power development that is such an M speciality, plus a hunger for revs quelled only by the engine's limiter. And all to the tune of an arresting soundtrack. Like the maximum output figure, peak torque of 600 Nm (442 lb-ft) also represents a new high point for a six-cylinder in-line petrol engine from BMW. The ongoing development of M TwinPower Turbo technology, coupled with the inclusion of two gasoline particulate filters and four catalytic converters, also ensures the high-performance engines can claim remarkable efficiency and exceptionally low emissions.