Tesla initially offered its Model S in three different configurations - the 40, 60 and 85 - with the numbers signifying the size of the battery pack in kilowatt-hours. All three of these variants have since been discontinued, replaced with models featuring both smaller (75 kWh) and larger (90 kWh) packs... that is, until today.

Tesla on Thursday (re)introduced two new lower-cost versions of its sedan, the Model S 60 and 60D, with pricing starting at $66,000 and $71,000, respectively. The new Model S 60 can accelerate from zero to 60 mph in 5.5 seconds with a top speed of 130 mph and a range of 210 miles. The all-wheel drive Model S 60D, meanwhile, can hit 60 mph in 5.2 seconds with a range of 218 miles.

The Verge notes that both new models will ship with the hardware for Tesla's self-driving technology although buyers will have to pay a fee to unlock it. What's more, both of the new vehicles are actually equipped with 75 kWh batteries but their capacity has been limited via software. That may seem silly but from a manufacturing point of view, it apparently makes more sense to manufacture larger batteries that can be used in multiple models. The additional capacity can be unlocked, again, for a fee.

In April, Tesla refreshed the Model S line with updates such as a new front grille, new LED headlights and faster charging capabilities. The Model S also received the same air filtration system found on the Model X which Tesla claims would be effective against biological weapons.