Tesla has just created the fastest car you can buy -- and it's all thanks to the company's new 100 kilowatt-hour (kWh) battery. The Model S P100D with Ludicrous Mode is a slightly upgraded version of the Model S P90D (with a 90 kWh battery) that was released in March. But this new version can go 0-to-97km/h in just 2.5 seconds.