Most powerful production BMWs ever come to UK forecourts

New BMW M5 and M6 models with the addition of a Competition Package will be heading to the UK later this year, each boasting a jaw-dropping performance hike that sees horsepower rise to around 573bhp each.

The 0-62mph sprint time has also been improved upon in both models, down to just 4.2 seconds in the M5 and 4.1 seconds in the M6 Coupe and Grand Coupe.