At the 2017 Geneva motor show, Blume told Auto Express that the Porsche's first dedicated EV will be sized below the Panamera, the current generation of which measures just over five metres in length.
Porsche is targeting the initial variant to have a driving range of 500 kilometres. With the aid of a 150kW fast charging network, the Mission E can be topped up to 80 per cent capacity within 15 minutes.
Within the Volkswagen Group, Porsche is leading the roll out of a fast charging network, which Blume says should be in place by the time the Mission E is launched at the end of the decade.
As with other models in Porsche's range, Blume says that the Mission E shouldn't be restricted to just one drivetrain, with the company investigating higher performance variants, including a GT-E model.
Like the Tesla Model S, the car the Mission E is most commonly compared with, the new EV will have the ability to install over-the-air software updates. Buyers may even be able to upgrade or unlock features, such as more power, via software updates.
This being the Volkswagen Group, it would be surprising if the Mission E's platform isn't shared with at least one other brand. Auto Express suggests that Bentley will use the Mission E's underpinnings for its own electric sports car.
Blume reiterated his desire for the company to sell 20,000 Mission E EVs per annum. Getting near that target will help the company justify the 700 million euros ($993 million) that's being invested in plant upgrades and additional employees.
The Mission E concept was revealed at the 2015 Frankfurt motor show with two electric motors delivering a total of 440kW to all four wheels. The car was confirmed for production in December that year.