BMW I8: Sant Julià de Lòria
The production i8 had a 7.1 kWh lithium-ion battery pack with a usable capacity of 5.2 kWh and intelligent energy management that delivered an all-electric range of 37 km (23 mi) under the NEDC cycle. Under the EPA cycle, the range in EV mode was 15 mi (24 km), and the total range was 330 mi (530 km).
The production version had a fuel efficiency of 2.1 L/100 km (134.5 mpg‑imp; 112.0 mpg‑US) under the NEDC test with carbon emissions of 49 g/km. Under EPA cycle, the i8 combined fuel economy in EV mode was rated 76 equivalent (MPG-equivalent) (3.1 L gasoline equivalent/100 km; 91 mpg-imp gasoline equivalent), with an energy consumption of 43 kW-hrs/100 mi and gasoline consumption of 0.1 gal-US/100 mi.
The combined fuel economy when running only with gasoline (after the battery was drained empty) was 28 mpg‑US (8.4 L/100 km; 34 mpg‑imp) for city driving, and 29 mpg‑US (8.1 L/100 km; 35 mpg‑imp) on the highway.
The U.S. Environmental Protection Agency’s 2014 edition of the Light-Duty Automotive Technology, Carbon Dioxide Emissions, and Fuel Economy Trends introduced utility factors for plug-in hybrids to represent the percentage of miles that would be driven using electricity by an average driver, in electric only or blended modes. The BMW i8 Coupé had an EV mode utility factor of 37%, compared with 83% for the BMW i3 REx, 66% for the Chevrolet Volt, 65% for the Cadillac ELR, 45% for the Ford Energi models, 43% for the McLaren P1, 39% for the Porsche Panamera S E-Hybrid, and 29% for the Toyota Prius PHV.
The battery capacity of both models launched in 2018, BMW i8 Roadster and the i8 Coupé, was increased to a gross energy content of 11.6 kWh. This, and other improvements, increased the all-electric range to 55 km (34 mi) for the BMW i8 Coupé and 53 km (33 mi) for the BMW i8 Roadster, both under the NEDC test.
Under the U.S. EPA driving cycle, the range only increased from 15 mi (24 km) to 18 mi (29 km).
The following are the BMW i8 U.S. Environmental Protection Agency (EPA) ratings for all-electric range and fuel economy for all variants of the i8 between 2014 and 2020 model years.