The BMW 5 Series range will expand later this year with a new quad-turbo M550d xDrive variant. BMW claims it is the world’s most powerful six-cylinder diesel engine, sprinting from 0-62mph in 4.4 seconds.
The M550d will be available as a saloon or Touring estate, featuring a new 3.0-litre six-cylinder diesel engine with four M Performance TwinPower turbos. BMW says the M550d produces 450Nm of torque from 1,000rpm, with peak torque of 760Nm available at 2,000rpm. Every car comes with an eight-speed Steptronic sports transmission as standard, as well as a rear-biased intelligent xDrive all-wheel drive system.
But despite all that power and torque, BMW says the new M550d saloon emits only 154g/km while returning 39.9mpg. The Touring is slightly less economical, posting figures of 163g/km and 37.9mpg.
The use of a fourth turbocharger “further optimises the engine’s efficiency and performance characteristics,” according to BMW. The previous-generation tri-turbo M550d (not available in the UK) featured a similar setup, but in the new car two small turbos replace the single large turbo for increased boost pressure.
All cars get BMW’s M aerodynamic package, M sports suspension lowered by 10mm, Integral Active Steering and exclusive 19-inch alloy wheels. Also included is a set of dark chrome M Performance exhausts and blue metallic M Sport brake callipers, while Cerium Grey trim covers everything from the door mirrors to he radiator grille. BMW’s Adaptive M Suspension Professional system also features.
Inside it’s business as usual, with a leather M Sport steering wheel and BMW Connected, which includes live sat-nav updates and online services. This is in addition to the various assistance systems, which BMW says takes the 5 Series “one step further towards automated driving”. Leather or Alcantara sports seats feature on the options list.
There’s no official word on pricing, but unlike the old model we expect the M550d xDrive to arrive in UK dealers before the end of the year. It’s likely to command a hefty premium over the £49,335 BMW 530d xDrive M Sport, however.
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