Codenamed E84, the X1 is expected to hit dealers' showrooms next year. Although Car Magazine says its platform is the same one used by the current 3 Series, or else, E90, we believe it must be the same one used by the 1 Series, E87. Anyway, X1 is 4.46 m long and has a wheelbase of 2.76 m, what makes it only 11 cm smaller than X3, which a 3.5 cm shorter wheelbase.
Engines will very likely be the same ones used by the 1 Series. Besides the X1, BMW is also preparing the X2, the "coupe" version of the small SUV.
Source: Car Magazine