Infiniti do a 3.5 litre V6 Hybrid engine, 0 - 60 in under 5.5 seconds. Might be fun if they tried to squeeze that in under the bonnet of the Q30, and handed the car over to NISMO to sort out the handling... about time the BMW M5 had some decent rivals.
In any event, their 2.2 diesel in the Q30 does 0 - 60 in under 8.5 seconds which is more than respectable ....and if you don't mind invalidating the warranty, you can have the engine re-mapped and increase the 170bhp to around 205 for the deisel, and from 211 to 240 (ish) for the 2.0 petrol.... Will cost you about £400 quid.
Anyway, without boring you with the mechanics, a Hybrid engine does not necessarily mean a faster engine. Look at the Prius!!!