The key to the AC-150 powertrain was the use of an AC electric motor. It developed the AC-150, a 200 horsepower integrated drive system for compact to mid-size passenger cars. The car that came to be known as the Tesla Roadster actually traces its heritage back to 1994 and a company called AC Propulsion located in San Dimas, California, approximately 30 miles east of Los Angeles. The Lotus Elise was not engineered with the advanced airbags in mind and making the necessary modifications was deemed to be too expensive. Sales in the US ended in August 2011, when regulations regarding two-stage air bags went into effect.
Production ended less than a month later due to a lack of chassis available for Tesla to convert. Tesla’s contract with Lotus ended in December 2011. The Sport galloped to 60 mph in 3.7 seconds, 0.2 tenths faster than its siblings.Īccording to the EPA, the Roadster had a range of 244 miles and was rated at 120 MPGe, meaning its efficiency was equivalent to a gasoline-powered car that got 120 miles per gallon. The fastest Roadster of them all, it had the same 288 horsepower but torque rose to 295 lb-ft. Shortly thereafter, Tesla offered the Roadster Sport. It had 288 horsepower and 273 lb-ft of torque. In 2011, the Roadster 2.5 was introduced. The Tesla Roadster came with an AC induction motor rated at 248 horsepower and 200 lb-ft of torque. 500 examples of the Roadster were sold through June 2009. Tesla CEO Elon Musk took delivery of the first production car in February 2008. It went on to be part of international auto shows in Los Angeles, Detroit, and Frankfurt, Germany. The car was also featured at the San Francisco auto show on November 18 that same year. It was an invitation event for 350 people held at the Barker Hangar at the Santa Monica airport. The Tesla Roadster was shown to the public for the first time on July 19, 2006, in Santa Monica, California. The 18650 cells were selected because they were readily available and reasonably affordable. Each sheet is made up of 9 bricks connected in series, and each “brick” contains 69 lithium-ion cells (“18650” lithium-ion cells) connected in parallel. An 18650 battery cell is cylindrical in shape, approximately 18 millimeters in diameter, and 65 millimeters in length. The battery pack - which Tesla calls the Energy Storage System - is comprised of 6,831 lithium-ion cells arranged into 11 sheets connected in series. Ultimately, a total of 2,450 Roadsters were sold between 20. Tesla contracted with Lotus to provide a total of 2,500 cars manufactured without a drivetrain. The Tesla Roadster is a Lotus Elise chassis married to a lithium-ion battery pack and an electric motor driving the rear wheels through a one-speed transaxle. Who would build such a car? The batteries would weigh so much, the car would probably have only modest acceleration and handle more like a truck than a nimble two-seater with sporting pretensions. In 2005, rumors started to spread in the automotive world about an electric sports car powered by thousands of laptop batteries.
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