The slueths at 1Addicts pulled up this chart listing future BMW engines, including a 340 hp twin-turbocharged N54 inline-six for the BMW 1M. Makes sense. Intriguingly, this document also hints at a 445 hp BMW 1-series. Wait, what?
The new BMW 1 Series M Coupe will not be called the M1. According to BMW's Dr. Kay Segler "BMW M1 is a name with powerful historical associations...so our new model will be called the BMW 1 Series M Coupé."