BMW has just released details of the new 2018 M550d xDrive, the flagship diesel powered 5-series. This is a 3.0-litre diesel with 400hp, last hurrah for diesel technology. The quad-turbocharged engine is mated to an 8-speed automatic and all-wheel-drive system as standard.
After coming out with the gasoline-powered M550i xDrive, BMW is now showing off its diesel counterpart, the new M550d xDrive, which boasts the most powerful six-cylinder diesel engine in production. The previous M550d made quite a name for itself with a mere three turbochargers by combining all the usual 5 Series attributes with an unprecedented level of pace and performance.
2018 BMW M550d xDrive Engine
All numbers have been improved over the previous tri-turbo M550d xDrive. The 3.0-litre straight-six diesel engine is aided by a total of four turbos. There’s already 332 lb-ft of torque at just 1,000 rpm, and the 560 lb-ft peak arrives only 1,000 revs later and is maintained up to 3,000 rpm. The peak power is generated at 4,400 rpm. BMW says 62mph comes up in 4.4 seconds (!) for the saloon and 4.6 seconds for the Touring. Top speed is limited to 155mph, but you would have to assume it’s capable of far more than that.With the sedan you’re looking at 0-62 mph in about 4.4 seconds. Opt for the wagon and the time drops to 4.6 seconds. Top speed is limited to 155 mph on both.
Visually the 2018 M550d shares much with other M Performance models, with an updated front facia and liberal use of Cerium Grey highlights for the window surrounds, mirror caps and badging. The overall look is subtle, but still menacing, helping distinguish the M550d from lesser 5-series models, something rivals like the Audi A6 often have trouble with.
The diesel monster gets an M sports suspension as standard and that drops the ride height by 10 millimeters (0.4 inches). Sport-tuned suspension, standard 19 inch wheels shod in 245/40 R19 tires front and 275/35 R19 rear. If you want to go bigger, 20-inch wheels are offered as an option, uprated brakes, and an aerodynamics package. Inside, you get sport seats with Alcantara trim, custom treadplates with “M550d” logos, and a steering wheel and foot pedals from the BMW M parts bin. The M550d also gets what BMW calls an Integral Active Steering with a variable rack-and-pinion ratio.
2018 BMW M550d xDrive Fuel Consumption
fuel consumption with BMW quoting an average of 5.9 l/100 km (39.9mpg US / 47.9mpg UK) with CO2 emissions of 154g/km for the sedan and 6.2l/100km (37.9mpg US / 45.6mpg UK) with 163g/km for the Touring on the European driving cycle. Fuel consumption is down by 0.4 liters in the combined cycle to 5.9 liters in the case of the sedan.
Available in both sedan and the more practical Touring (station wagon) body styles. BMW has yet to confirm the 2018 M550d xDrive for the UK and BMW has no plans to offer the M550d in North America. European prices should be announced in the coming weeks. BMW says the saloon will be available from July, with the Touring on sale by the end of the year.