The motorized hardtop mechanism only adds 110 pounds to the curb weight of the vehicle, which means that it should weigh in at just under 2,900 pounds. To put that in perspective, the new 2020 Toyota Supra weighs 3,397 pounds. Because the 600LT already featured an incredibly stiff MonoCell II carbon-fiber tub, there was no need to add additional bracing to its Spider counterpart.
The 600LT Spider is still powered by a twin-turbocharged 3.8-liter V6 engine that pumps out the same 592 horsepower and 457 lb-ft of torque. With this engine at the driver's command via a 7-speed dual-clutch transmission, McLaren says that the 600LT Spider will go from a standstill to 62 mph in just 2.9 seconds (identical to the 600LT) and will hit 124 mph in just 8.4 seconds (0.2 slower than its fixed-top counterpart).
As for its top speed, McLaren states that the 600LT Spider will hit a top speed of 201 mph with the top up. With the top stowed, the 600LT Spider will hit an aerodynamic wall at 197 mph.
As you might expect for a 200+ mph supercar with a carbon fiber chassis and a high-strung engine, the McLaren 600LT Spider doesn't come cheap. It features a base price of $259,000, which can be inflated with the MSO Clubsport Pack, which costs an additional $23,400. This option package adds carbon fiber seats, aero bits, and titanium wheel nuts. It also deletes air conditioning, which might be a bit too much to ask for owners in southern states...