2008–2012 Original Roadster
Tesla's first car, a carbon-fiber two-seater assembled by Lotus on a heavily modified Elise-based chassis, sold from 2008 until production ended in January 2012 after about 2,450 cars.
The original Roadster was a two-seat, rear-wheel-drive sports car assembled by Lotus at Hethel, England, from parts largely supplied by Tesla. Its chassis descended from the Lotus Elise, but the wheelbase was two inches longer, the frame carried extra stiffening for the battery, the body panels were carbon fiber, and the car weighed more than 700 pounds more than an Elise. Only about 6 percent of parts were shared. The battery was Tesla's own design: 6,831 cylindrical 18650 lithium-ion cells grouped into bricks and sheets for a pack of about 56 kWh at a nominal 375 volts.
Early production was rough. Tesla's first two transmission suppliers could not build a two-speed gearbox that lasted, and in December 2007 Tesla said early cars would ship locked in second gear, which slowed the 0 to 60 mph time to 5.7 seconds. The first production car, P1, reached Musk on February 1, 2008. In September 2008 Powertrain 1.5 switched to a single-speed BorgWarner gearbox, raised torque from 211 to 280 lb-ft and brought an EPA combined range of 244 miles. Tesla offered the update to earlier owners at no charge.
In July 2009 Tesla began building the 2010 model-year Roadster, known as the 2.0, and added the Roadster Sport, with 0 to 60 mph in 3.7 seconds against 3.9 for the standard car. Right-hand-drive cars followed in early 2010. The Roadster 2.5 premiered at the Goodwood Festival of Speed on July 2, 2010, with a new front fascia, a rear diffuser, larger and more supportive seats, extra sound deadening and an optional touch-screen navigation system with a backup camera.
Lotus built the gliders under a contract that ran out at the end of 2011, and Tesla had stopped taking US orders in August 2011. Production ended in January 2012, closing with 15 Final Edition cars, five each for North America, Europe and Asia, painted Atomic Red. About 2,450 Roadsters were sold in more than 30 countries. In 2016 Tesla began shipping the Roadster 3.0 package for existing cars, a 70 kWh pack plus lower-rolling-resistance tires and bearing and brake changes, priced at $29,000 and rated by Tesla at about 340 miles.