Powertrain 1.5." The Telsa designed, single-speed gearbox is expected to help provide 30% more power allowing the Roadster to once again accelerate from 0 to 60 in 3.9 seconds as it did with the original, flawed, two-speed transmission. It's also more efficient resulting in an extended, 244-mile range (221 miles currently) from a single charge. All Roadsters equipped with the interim transmission will be upgraded free of charge. Tesla says that it will now ramp production to 10 Roadsters per week, hitting 20 per week within a few months, and 40 per week by early 2009. Most of which we expect to find riding the PCH in total, luxurious, battery-powered silence.