The regular M8 uses a slightly detuned version of the V8 producing 592bhp – the same as the standard M5. Peak power appears at 6000rpm and the same 553lb ft as the Competition model is delivered between a slightly narrower rev band, from 1800-5600rpm.
The M8’s power figure is 69bhp more than that of the turbocharged 4.4-litre V8 used by the M850i, which shares the M8’s torque figure. The 0-62mph time for the standard M8 is 3.3sec for the Coupé, and 3.4sec for the Convertible. Both weigh 1885kg and are limited to a nominal top speed of 155mph, although this can be raised to 190mph with an optional Driver’s Package that also brings tyres with a higher speed rating.
As with the M850i, the Convertible uses a multi-layer fabric roof that stows in a dedicated compartment at the rear. The model enters BMW’s M line-up as a replacement for the rear-wheel-drive M6 Convertible and a high-end rival to the likes of the Mercedes-AMG S63 Cabriolet.
Key identifying features of the new BMW include a uniquely styled bumper, M badging in the grille and side air vents, 20in M-Sport wheels, M-Sport mirror housings, a boot deck lip spoiler and a rear bumper with a wide diffuser element and BMW M’s quad round tailpipe treatment.
At 4867mm long, 1907mm wide and 1362mm high, the M8 Coupé is 36mm shorter, 8mm wider and 12mm lower than the discontinued M6 Coupé. It also uses a wheelbase that is 24mm shorter than that of its predecessor at 2827mm, with corresponding track widths that are reduced by 4mm at the front, at 1627mm, and increased by 20mm at the rear, at 1632mm.
Inside there are a number of traditional M division elements, including the latest M-Sport steering wheel, stainless steel pedal caps, heavily contoured M-Sport seats, unique M-Sport digital instruments, M-specific graphics for the infotainment system and a newly designed M-sport gear lever.