If you are in the market for an English supercar, here are the most important McLaren 600LT Specs. Acceleration is always on tap since the curb weight is under 3,000 lbs. The exhaust system is simply top exit pipes on the catalytic converter. The titanium system requires no mufflers, as the larger turbos convert sound into boost. The cutting edge aerodynamics allow the McLaren 600LT top speed is 204 mph in the coupe or 196 mph with the Spider’s top down. If you enjoy a battle under the lights, the McLaren 600LT 1/4 Mile averages 10.4 seconds.