Since this new McLaren is a derivative of the 600LT coupe, we assume it will make the same 592 horsepower and 457 pound-feet of torque. Those ponies ought to sound much sweeter without a roof in the way. The 600LT Spider will probably weigh about 200 pounds less than the regular 570S Spider, similar to the weight difference between the coupes. And if the 570S Spider is anything to go by, there shouldn't be much, if any, difference in performance between fixed- and removable-roof 600LT models.
McLaren will reveal the car on January 16, so we won't have to wait long for all the delectable details. When it launches, it will be the fifth McLaren model to have the Longtail's LT designation. It won't be the first convertible, though, since McLaren made a 675LT Spider a few years ago.