Set to be produced in a limited run of 300, the BMW M5 '30 Jahre M5' (30 years of the M5) builds on the performance gains of the recently introduced M5 Competition Pack.
It consequently gets a lightly reworked version of BMW M division’s twin-turbocharged 4.4-litre V8 direct-injection petrol engine delivering an added 25bhp, at 592bhp.
This provides the 1870kg four-door with a power-to-weight ratio that is 14bhp per tonne up on the M5 Competition Pack, at 317bhp per tonne. Torque has also risen by 15lb ft, swelling to a new peak of 516lb ft on a band of revs between 1500rpm and 6000rpm.
The increase in reserves has been achieved through what BMW M division development boss Albert Biermann described as “tweaks to the engine management system and an increase in the turbocharger boost pressure”.
Drive is channelled to the rear wheels through a lightly reworked version of the standard M5’s seven-speed dual-clutch automatic gearbox, which boasts new software mapping. The result is the fastest series production M5 ever.
BMW claims 0-62mph in just 3.9sec and a top speed that is limited to 190mph in combination with an optional M Driver’s Package. Combined cycle fuel consumption is a claimed 28.5mpg and its CO2 emissions are rated at 231g/km.
Underpinning the new M5 30 Jahre is a chassis featuring the same subtle modifications incorporated on the M5 Competition Package, with firmer springs and dampers, a 10mm reduction in ride height and standard 20-inch wheels shod with 265/40 front and 295/40 rear tyres.