The BMW i8 was introduced in 2014, as the second car in BMW's quasi-sub-brand 'BMW i' after ... This helps to keep the weight of the i8 low, despite the large 96kW electric motor and 7.1kWh lithium ...
The BMW does weigh in 90kg heavier than the 1395kg Porsche however, a concoction of lightweight carbonfibre and aluminium in the i8’s chassis not being able to counter the heavy battery unit ...