Elon Musk: upgrade to Tesla Model S car makes it 'faster than falling'

Musk announces Tesla Motors will debut a new roadster in four years and says upgrade to current Model S means car can go zero to 60mph in just 2.8 seconds

Elon Musk has made it official: his electric car company, Tesla Motors, is planning to debut an unnamed new Roadster in four years, and it won't be based on the Lotus like the last one.

But Musk isn't done with the old cars yet. The electric tech mogul held a press conference on Friday to tell reporters how fast his old car goes with its new upgrade: zero to 60 miles per hour in 2.8 seconds, which would put the four-door sedan in a league with high-end sports cars like the most recent Lamborghini Murcii(C)lago.