2015 BMW X5 M and BMW X6 M pricing and specifications

The range-topping versions of the X5 and X6 will arrive in the second quarter of 2015, with the high-performance duo claimed to "set the benchmark" for dynamic ability and agility.

The X5 M (pictured below) will be priced from $185,900 plus on-road costs, positioning it just over the Mercedes-Benz ML63 AMG ($181,900), but well below the upcoming Range Rover Sport SVR ($218,500) and Porsche Cayenne Turbo (from $230,800).

The X6 M (pictured below) attracts a premium over its more practical sibling, and is priced at $194,700 plus costs.

Both models are fitted with a 4.4-litre twin-turbo V8 engine producing 423kW and 750Nm - the most powerful engine BMW has ever offered with all-wheel drive - and both can sprint from 0-100km/h in just 4.2 seconds. An eight-speed sports automatic with paddleshifters and launch control function is standard.

The new engine offers 15kW more than its predecessor, and torque has risen by 70Nm. However, fuel use is down 20 per cent, with claimed consumption rated at 11.1 litres per 100 kilometres.

Read full details on the 2015 BMW X5 M and 2015 BMW X6 M.

2015 BMW X5 M and 2015 BMW X6 M - standard equipment: 
21-inch alloy wheels
Lane departure warning
Forward collision warning with autonomous emergency braking
Pedestrian warning with light braking function
Parking Assistant with fully automated braking and acceleration
Surround view (360 degree) camera system
Adaptive LED headlights
Head up display
DAB digital radio tuner
Harman Kardon surround sound system with 16 speakers
Tyre Pressure Monitor
ConnectedDrive Freedom (including ConnectedDrive Services, Remote Services, Real Time Traffic Information, Concierge Services)
Dynamic Performance Control
Dynamic Damper Control adjustable dampers (with Comfort, Sport and Sport+ settings)
Dynamic Drive bodyroll mitigation
Heated, electric front seat adjustment and steering wheel adjustment with memory settings and comfort access
Merino leather trim
Electronic tailgate
Sunroof
BMW Individual leather instrument panel (X6 M only)
Metallic paint