In the Model S naming conventions, the letter “D” will stand for “dual motor.” The Model S is currently a rear-wheel-drive car, which has hurt sales in snowier climates. Tesla is adding a second motor to power the front wheels.
Tesla plans to offer it in all trim levels. It will be called the 60D, 85D or P85D, depending on whether the car has a 60- or 80-kilowatt-hour battery pack and whether the owner opted for the “performance pack.”
Tesla Motors said the second motor will be tuned in the P85D for faster acceleration, helping the car race from 0 to 60 mph in 3.2 seconds, compared with 4.2 seconds for the current P85. The all-wheel-drive version will have a top speed of 155 miles per hour, compared with 130 mph for the current version.
Tesla said the 60D will get 225 miles on a charge, compared with 215 miles for the base model. The 85D will also get an extra 10 miles, for a total of 295 miles.
All-wheel drive will be a $4,000 option on the base and mid-range Model S, which start at $71,000. The base price for the P85 with all-wheel drive — which will be known as P85D — is $120,000. The P85D will go on sale in December, while the other versions will go on sale in February.
During the event, Musk also revealed driver-assistance systems that use cameras and radar to prevent drivers from drifting off the road or striking a car ahead of them when using cruise control. Though drivers are legally bound to pay attention at all times, the Model S will not force them to keep their hands on the wheel, Musk said. And if the driver pushes the turn signal lever, the car will change lanes on its own.
“Once we upload the software over the next two or three months,” Musk told reporters, “the Model S will have the most sophisticated driver assistance or autonomous functions of any (production) car on the road.”
Tesla’s production line started equipping the Model S with the necessary cameras and sensors about two weeks ago. Musk has positioned these sorts of features as a stepping stone to autonomous driving.
Musk told reporters that the company expects to have a “fully autonomous car” in five or six years,”with the regulators maybe taking two or three years beyond that to approve” the system.[wzslider height=”400″ lightbox=”true”]