Tesla Model X According to Tesla Motors, deliveries were lower than expected because production was impacted by severe Model X supplier parts shortages in the first two months of 2016, and because Tesla had been too ambitious in wanting advanced features (committed "hubris"). The first Model X that didn't need corrections was made in April 2016. Sales during the second quarter of 2016 totaled 4,638 units. Although production was up 20% from the previous quarter, the number of vehicles in transit at the end of June 2016 was much higher than expected (5,150 including Model S cars), representing 35.8% of the number of
Tesla Model S Tesla Model S Performance model has a three-phase, four-pole AC induction and rear-mounted electric motor with copper rotor. The base model uses a and motor. The company claimed a , lower than any other production car when released. Independent measurement by "Car And Driver" in May 2014 bore out Tesla's claim by exactly confirming a . The rear axle has a traditional open differential. Models with dual motors also have an open differential on the front axles as well. The front and rear axles have no mechanical linkage – with dual motors, the power distribution among them is controlled electronically.