This car is in reality a E91 with an X1 nose on it. The X1 as we reported earlier will be based on the E91 platform. This mule is allegedly testing the new I4 turbo that BMW and PSA recently agreed to in a joint venture. It is much cheaper and easier for BMW to test cooling and other related systems in a modified car than to create a pre-production model. What is interesting to see is that these new motors will not only be used in the Z, and 1 as we were originally led to believe. They will be used elsewhere in the model lineup (but if you consider the X1 as part of the 1 series then it makes more sense!). There is little indication that the US will see these 4 cylinders anytime soon.