Buick offers five cars for the U.S. market, but its largest sedan, the LaCrosse, comes the closest to competing with luxury sedans such as Tesla's Model S.
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Granted, there isn't much cross-shopping between these two cars, although that is mostly because of image reasons. Both are of similar size (except width) and include similar interior space for five adults.
The average selling price of a Tesla is more than twice the average selling price of a Buick. Part of this difference, however, is in the de facto prepayment of gasoline, as Tesla advocates never fail to remind us. If you spend $2,400 per year on gasoline (12,000 miles, 20 MPG, $4 per gallon), the idea is that a Tesla saves you $48,000 on gasoline over a car's 20-year life cycle, making the total price you pay for a Tesla and a Buick similar in the long run.
For the first half of 2014, Buick sold 114,000 cars in the U.S. and 451,000 cars in China for a total of 565,000. Assuming a similar second half of 2014, that would imply Buick sells 1.13 million cars a year, or 32 times the 35,000 Tesla is expected to sell in 2014.