The
BMW Z3 offered an array of four- and six-cylinder engines, but the M division has revealed a unique prototype from deep inside its skunkworks packing a V12. Few details were released along with this trio of never-before-seen photos, but given the time period in which the Z3 was built, we'd surmise it packs the 5.4-liter V12 from the 750i and 850Ci, or even the larger 5.6 from the 850CSi (which was, in all but name, essentially an M8), but probably not the 6.1-liter unit BMW made for the
McLaren F1.