BMW Technology......What Makes It a Driver's Car.

50:50 weight distribution.

The perfect balance of performance and precision: the ideal distribution of weight between the front and rear axles makes your BMW superbly agile.

Through the intelligent use of lightweight components and innovative production processes, it is possible to keep the vehicle weight to a minimum while at the same time achieving optimum weight distribution. The front and rear axles are made entirely out of aluminium, and in some models (BMW 5 Series and 6 Series), the entire front of the vehicle is made of this light yet strong metal. Engine components are made of aluminium, or alloys containing magnesium, and carbon-fibre composites further enhance your BMW's power-to-weight ratio.
Every kilo less represents a measurable increase in agility and safety, and even the vehicle’s structure can be adapted to optimise axle load - little overhang at the front, engines and transmission located as far back as possible. Weight should ideally be concentrated close to the vehicle’s centre of gravity.
Equal weight distribution results in greater agility, neutral self-steering behaviour and outstanding traction. Supported by Dynamic Stability Control (DSC) your BMW remains stable and controllable even in extreme situations: reduced weight means increased driving pleasure.

Source: BMW.com

Undoubtedly for me this is what makes BMW's a driver's car. The way it handles just instill confidence when you drive, be it a 118i or a 750Li. The Balance weight distribution is what makes it The Ultimate Driving Machine.