Originally Posted by EnI

I can conclude from the spy pics the engine under the hood is a turbocharged one. Haven't seen anything similar (cooling system) on NA engine configuration yet.

But ... is it some sort of V10 bi-turbo under the hood, or just testing N64 V8 bi-turbo?

I have to admit I haven't heard anything about S85 being upgraded with turbo chargers. But M officials said several times M turbo engines are possible, and there are the only 2 things we would never see in an M car:
1.) supercharged engine
2.) diesel engine


The only info I got right now is that M5 / M6 CS(L) variants are still on agenda - with upgraded engines, brakes, chassis, gearbox etc. And was promised to get additional info in not-so-distant future.

Stay tuned!