Tesla’s Model S P85D acts like a car built on the mantra “Waiting is for suckers.” This 691-hp battery-electric vehicle is for the impatient, the toe tappers, and the watch checkers. Tesla claims that the P85D is capable of reaching 60 mph in 3.2 seconds, shaving 1.4 seconds from the rear-drive P85 it replaces. To get down to that number, Tesla added a 221-hp electric motor to drive the front wheels. This secondary unit works in conjunction with the P85D’s 470-hp rear motor to provide four-wheel drive. A similar two-motor setup will be available on all Model S versions starting this spring, and the upcoming Model X SUV also will share the system. But for now, the most snow-friendly Tesla is the top-shelf P85D.