The Model S is quite heavy. Bear in mind the Model S has the interior space of a Mercedes C-Class or BMW 3-series.
Comparing the curbside weights of the high-performance versions of saloon (American: sedan), as the Tesla markets itself as a high-performance car.
Tesla Model S 85D: 2188kg
Mercedes AMG C63: 1785kg
BMW M3: 1646kg
Audi A4 3.0V6 TDI: 1540kg
The Tesla is over 400kg heavier than a comparable internal combustion car.
Considering larger cars, the Mercedes AMG E63 estate (American: wagon), a significantly larger car with significantly more space inside, weighs 1945kg. The Lexus LS, also a larger car weighs 1965kg. The Tesla still weighs over 200kg more.
The Tesla is heavy. Significantly heavier than its direct internal combustion equivalents.