The electric sports car will top out above 250 mph, or allow drivers to maintain a legal highway speed for 620 miles.

Tesla has unveiled the next-generation Roadster as a special surprise alongside the company's electric semi.

The electric sports car promises to break many records, including an unprecedented zero-to-60 mph benchmark below two seconds. Launching from a stop to triple-digit speeds takes just 4.2 seconds, good enough for an 8.9-second quarter mile.

The company plans to install a 200 kilowatt-hour battery pack in the car, which gains two rear seats for a 2+2 layout. The high-capacity battery is claimed to reach 620 miles on a single charge at highway speeds, enough to drive from Los Angeles to San Francisco -- and back -- without stopping to recharge.

Tesla CEO Elon Musk bluntly boasted that the new Roadster will deliver a "hardcore smackdown" to gasoline cars.

It will not come cheap, with the launch edition carrying a $250,000 price tag.