Last weekend we reported on Singapore’s Land Transport Authority (LTA) slapping an important tax surcharge on the Tesla Model S after running some emission tests and rating its energy consumption at 444 Wh/km. After accounting for Singapore’s grid emission factor of 0.5 g CO2/Wh , the LTA determined that the Model S somehow ended up on the worst end of the global city’s scale for vehicle pollution (C3 band).

Tesla has now issued a response (you can read the full statement below) and claims that when the Model S tested by LTA left Tesla’s factory in 2014 (yes it took a while to import it), it had an energy consumption rated at 181 Wh/km, less than half of what Singapore’s transport agency is claiming. How can we account for the discrepancy?  expand full story