The ELR is built upon the GM Delta II platform and incorporates a version of the Voltec propulsion system used in the Chevrolet Volt. The Voltec propulsion system includes a 119–135-kilowatt electric motor, a four-cylinder engine-generator and a 16.5 kWh lithium-ion battery pack.
The ELR has an official all-electric range of 37 miles (60 km) and a total range of 340 mi (550 km), as rated by the United States Environmental Protection Agency (EPA). Charging times are 12.5–18 hours using the 120-volt travel charger, and about 5 hours using a 240-volt charging station. Top speed is 106 mph (171 km/h) and accelerates from 0-60 mph in 7.8 seconds in range extended mode.
a faster 0-60 time of 6.4 seconds, steering and suspension upgrades, and an optional performance package with unique wheels, Brembo brake calipers, unique calibrations, and a sport steering wheel.