Each BMW has been using the usual fuel around the globe, but the global concerns, the climate change started years ago to make people start researching and developing other resources, the planet needs that, car manufacturers need to accomplish the transformation.
Hydrogen 7 is one of the BMW projects, the German car manufacturer has implemented all hydrogen technology inside is luxury vehicle, the BMW 7 Series, one of the most impressive cars not only because of the comfort, size, performance, but remember this car is also a heavyweight.
This means that in a world where hydrogen isn't available yet, at least as the usual car fuel, BMW couldn't send the car outside to the streets just using hydrogen, so this BMW Hydrogen 7 has also a combustion engine, nothing better for the driver than having that chance of deciding which fuel the car will burn, of course that the cheaper the better.
BMW Hydrogen 7 relies in a 7 Series with 12 cylinder, for those who care about speed the car will not reach all the speed that all that power car give has it's electronic limited to 230Km/h and it remains that way, whether the driver choses gasoline or hydrogen.
Fuel consumption is always a concern, this BMW can offer more than 200Km if the driver uses only hydrogen, that's probably not that much for most drivers around the globe but remember that this car must have place for a gasoline tank, which can deliver an additional 500Km, of regular driving of course.
Like the idea of driving a BMW Hydrogen car, maybe you do but the German car manufacturer isn't interested in the selling process, at least by now so this 7 Series model will not be available to the general public, BMW car will be leased to some costumers.