I had an RX7 with standard engine and turbos, but with an Apexi ECU and some time on a rr with a good tuner. Had her pushing out 300rwhp, although with twin turbos the boost was pretty spikey as the second one come on at about 4k revs!
I'd say for in gear performance my 335i would be similar but the delivery of power from standstill in the RX felt more brutal, and the handling was way better. Got through a lot of petrol though...
E90 335i M Sport