Vehicle Description
Up front there's a 260-hp, GM-supplied four-cylinder engine spinning a mighty generator. Next in line is a 20-kWh, American-made lithium-ion battery pack. Twin AC motors straddling the rear axle deliver 402 horsepower to the differential. The propulsion system, the Brembo brakes, the 22-inch cast aluminum wheels, and the aluminum suspension components are supported by an aluminum space frame stitched together with 260 feet of welds and a thousand or so rivets. The Karma's aluminum skin is finished with a solar-cell roof, a composite decklid, and plastic bumpers.
The Karma is always electrically driven; the gasoline engine powers only the generator. Slip into the elegantly tailored driver's seat, engage "stealth" mode, and you can motor sedately to the future with little more than a hum from the powertrain. Tugging the "sport" paddle to the left of the steering wheel brings additional energy to bear. When the gasoline engine kicks in to supplement the battery pack's wattage--to trim the 0-to-60-mph run from a claimed 7.9 seconds to 5.9, or to add 250 miles to the driving range--the extra thrust is accompanied by the whistle of a turbo spooling up, the snarl of angry exhaust gas, and a resonant boom or two. Bent on fulfilling its mission, the generator set keeps growling even when you ease off the accelerator.
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