BMW Vision Action on the Road
The Vision EfficientDynamics, which is rumored to come into production under the name 'i8', is expected to be powered by a 328-horsepower three-cylinder diesel-hybrid powertrain. The ultra-lightweight production car is tipped to run from 0-100 in just 4.8 seconds, and during normal driving, the new efficient supercar is estimated to achieve 62.5 miles per gallon.
Reaction to the 356-horsepower and 590 pound-feet of torque plug-in electric (one lithium-polymer battery stack + two electric motors) with dedicated lighter-weight three-cylinder diesel range-extending engine mounted amidships has been off the charts. Now we're all waiting for more details and, of course, that sticky price issue.
Our executive source goes on to say that total volume is being debated, but that it will fall between 5,000 and 10,000 units. The prototype's powertrain and basic sub-3,000-pound assembly will remain intact, but, says the source, "there will be less of the synthetic glass and more solid structure added to the final design." Uh-oh. We know why these alterations are needed, but does this mean it's going to migrate toward being a sort of sleek Toyota Prius? Let's hope not.
When we asked if this could finally be BMW's second true production supercar after the Giugiaro M1, the response was a firm "quite probably." So maybe our Prius/Honda Insight fears are overreaching. It'd be nice to maintain that 0.22 drag coefficient and the hellacious looks.
The EfficientDynamics is a 2+2 four-door hybrid that combines M Series performance with better fuel efficiency and less emissions than you see in many compacts. BMW performs this magic by marrying its ActiveHybrid technology with an extremely economical engine and excellent aerodynamics. The result is a concept car with a top speed governed at 155 mph and a zero-to-62 acceleration time of 4.8 seconds. More impressive, the car gets 62.2 mpg and emits a Prius-like 99 grams of CO2 per kilometer.
Power comes from a 1.5-liter direct injection 3-cylinder turbodiesel engine and an electric motor on each axle. The engine was small to squeeze in between the rear seat and the rear axle, which should make the Efficientdynamics Concept very agile. The diesel puts out 163 horsepower and 214 pound-feet of torque.
Add in the motors and total output is 356 ponies and a stump-pulling 590 pound-feet, though you can only get that much power in short bursts. The car has all-wheel-drive when running in electric mode. BMW says the car can run on the diesel engine, either one of the electric motors or any combination of the three.
The lithium-polymer battery pack sports 98 cells. It delivers 8.6 kilowatt-hours for driving the car, and BMW says the serial arrangement of cells has gross storage capacity of 10.8 kilowatt-hours. The pack weighs 187 pounds and BMW says it doesn’t need an active cooling system. BMW says the battery recharges in 2.5 hours at 220 volts.
