BMW i8 Concept: Plug-In Hybrid Sports Coupe—Full Details

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While its sports coupes are more of a known entity, the i8 Concept shown in Frankfurt today may be the most radical coupe BMW has ever built.

Its “stream flow” lines, characteristic of the new BMW ‘I’ sub-brand, include an adaptation of the BMW twin-kidney grille and extremely slim LED headlamps. The roof is transparent, as are portions of the side of the car. The carbon-fiber reinforced plastic  “Life” passenger cell is visually distinct from the “Drive” mechanical portions of the car with both color and accent lines.

The shape is a fairly close adaptation of the BMW Vision EfficientDynamics vehicle first shown in September 2009 at the Frankfurt Motor Show.

The BMW i8 Concept is a plug-in hybrid, with two powertrains: one electric, driving the front wheels, and one that uses a three-cylinder gasoline engine that powers the rear axle. Either one can be used independently, or the two can be used together, making the i8 what’s called a “through-the-road hybrid.”

See also: BMW i3 Concept: Battery Electric Urban Minicar—Full Details

A lithium-ion battery pack is housed in the tunnel between the passenger seats and powers a 96-kilowatt (131-horsepower) electric motor between the front wheels. The pack capacity is smaller than that of the all-electric i3, but BMW did not provide energy capacity figures. Like the i3, the i8 plugs in to recharge, with less than two hours needed for a full recharge on 240-Volt power.

The i8 Concept offers an all-electric range of up to 20 miles, though most likely at city speeds rather than high-speed driving. This will allow its drivers to enter and travel through future zero-emissions city cores, by switching to electric-only mode, before reverting to gasoline operation in less urban areas.

After that, the 223-hp,1.5-liter, turbocharged three-cylinder gasoline engine between the rear wheels switches on. While it drives the wheels mechanically through a conventional transmission, it also has a high-voltage alternator that can recharge the battery pack if needed.

Acceleration from 0 to 62 mph is given as 5.9 seconds—roughly equivalent to the 2012 Fisker Karma extended-range electric sports sedan that just went on sale. With a weight around 3260 pounds, the i8 is limited to a top speed of 155 mph.

BMW notes that the two powertrains are precisely controlled to complement each other’s power delivery. Not only do they provide all-wheel drive for maximum performance, but the electric motor can add power during gear changes for the gasoline engine, ensuring continuous power delivery

BMW did not reveal a price or schedule for the i8 sports coupe, though it will likely arrive slightly after the i3 urban electric vehicle—which is expected to go on sale during 2013 as a 2014 model.

BMW provided airfare, lodging, and meals to enable High Gear Media to bring you this first-person news report.

 
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Comments (3)
  1. Very cool, I can't wait to get a test drive!

  2. It really is a beautifully designed car if you can overlook the "really bag jokes" designed into it, like: What's with that mean dog-face steering wheel with the Darth Vader hat on its head and the angry owl-eyed dash board? BMW, you have some anger issues you should work on.

  3. If the BMW i8 is being compared to the Tesla Model S, they have a long way to go. The i8 is a Hybrid first of all, and the Model S is a pure (EV) Electric Vehicle with a 300 mile range on one charge. The Model S can be recharged up to 80% in 30 minutes, and their technology is far ahead of any EV on the road.
    Tesla has installed FREE superchargers in strategic locations throughout the country so owners/drivers can get to their destination free after the Model S is charged. Tesla is planing to build two new Models in the near future, the X and Generation 3 which will be more public affordable, but will still have the same technology and range as the S, plus will be able to use the Supercharger system. I read i8 cost is twice the model S

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