Tesla Model X

Musk announces “Ludicrous Speed,” a $10,000 upgrade for the P85D Model S. The upgrade improves 0-60 time by 10 percent, to 2.8 seconds, with a quarter-mile sprint dropping to 10.9 seconds. The top speed increases to 155 miles per hour, 20 percent faster than on a standard P85D. The Model X will also have Ludicrous Speed as an option, but because that vehicle is 10 percent heavier than the S it will be slower.