I'm not sure how to convert from kW to hp though. But measuring in kW is more accurate though. Since the Subaru WRX STi can muster 0-60mph in 4.4 sec with a 206kW engine that also musters 280 ponies, I suspect that with 300kW, you could be looking at 450 hp estimated (and that's even more power than a 5.5 V8 engine from the M5).