The triple-turbocharged torque monsters have been positioned just above the xDrive 50i variants from the standard SUV range and more than $30,000 below the high-performance M models.
In dealerships from June, the X5 xDrive M50d is priced from $147,000 while the X6 xDrive M50d starts at $157,000.
Both models are powered by the brand’s all-new triple-turbocharged inline six-cylinder diesel engine, which produces 280kW of power (4000-4400rpm) and a whopping 740Nm of torque (2000-3000rpm).
The unique triple-boosted system activates a small turbocharger at low revs, a larger turbocharger at around 1500rpm and a third turbocharger between 2600-5400rpm for added boost pressure and power output.
The BMW X5 xDrive M50d sprints from 0-100km/h in 5.4 seconds – one-tenth faster than the twin-turbocharged V8 petrol-powered xDrive 50i – yet uses 40 per cent less fuel (7.5 litres per 100km versus 12.5L/100km).
The BMW X6 xDrive is fractionally faster, completing the sprint in 5.3 seconds – again one-tenth sharper than the xDrive 50i variant – and uses 7.7L/100km on the combined cycle.
Both M50d models feature air suspension with automatic self-levelling of the rear axle. The X5 gets BMW’s Performance Control electronics system, while the X6 gets the more advanced Dynamic Performance Control, which detects oversteer and understeer and counters them by sending more drive to the wheels where it is most needed.
The Adaptive Drive package, which includes electronically controlled dampers and active anti-roll, is standard in the X6 and optional for the X5.
Visually, both M Performance models feature unique front bumpers with large air intakes, a revised rear bumper and side skirts, metallic grey mirror caps, 20-inch alloy wheels, V8-styled oval tailpipes and a bonnet ‘powerdome’ for the X6.
Standard features include adaptive bi-xenon headlights, head-up display, Navigation Professional system, M leather steering wheel with paddle shifters, alcantara/leather sports seats with white contrast stitching and an anthracite headliner.
The introduction of the X6 xDrive M50d coincides with the mid-life refresh of coupe-style luxury sports SUV, which brings mild styling updates, a fifth seat and internet connectivity to all models, and adaptive LED headlights and bonnet powerdome for the X6 M.
The price of the standard range has increased $1000 while the flagship X6 M is now $5500 more than before.
2012 BMW X5 and X6 manufacturer’s list prices (excluding government and dealer charges):
- X5 xDrive 30d – $92,100
- X5 xDrive 35i – $103,900
- X5 xDrive 40d – $113,300
- X5 xDrive 50i – $134,000
- X5 xDrive M50d – $147,000
- X5 M – $178,000
- X6 xDrive 30d – $110,900 (+$1000)
- X6 xDrive 35i – $121,000 (+$1000)
- X6 xDrive 40d – $127,400 (+$1000)
- X6 xDrive 50i – $150,400 (+$1000)
- X6 xDrive M50d – $157,000
- X6 M – $190,900 (+$5500)