The BMW 1 Series will get more exposure thanks to the debut of the M135i Concept at the 2012 Geneva Motor Show. The new M135i Concept is BMW's answer to the Audi RS3 and the first M Performance car with a gasoline engine (rather than a diesel). It also gives us a first look at the three-door version of the all-new 1 Series. The M135i Concept is powered by a 3.0-liter Twin Power Turbo straight-six that produces more than 300 horsepower.