Prototype testing of the ultrapowerfulhas concluded, wrapped up with a neat little bow, ostensibly for the holiday season. During high-speed evaluation, the prototype XP2 version of this hypercar reached its terminal velocity more than 30 times.
If you neglected to read the headline of this story, the British automaker's latest and greatest Ultimate Series model tops out at an astonishing 250 mph. Naturally, getting any vehicle up to that speed requires a lengthy bit of tarmac, which is why testing was done at the Kennedy Space Center in Florida, specifically at the Johnny Bohmer Proving Grounds. Providing ample room to stretch this car's proverbial legs, the space shuttle landing runway was used. It's a section of pavement some three miles long and 100 yards wide.
Aside from Florida, McLaren also tested the Speedtail at tracks in Spain and Germany. In terms that are easier to wrap your head around -- well, perhaps slightly easier -- the car can rocket from a standstill to 186 mph in less than 13 seconds.
But what does it take to hit 250 mph? In short, a boatload of power, but that's not all. For starters, the Speedtail is motivated by a hybrid drivetrain. Centered around a twin-turbocharged, 4.0-liter V8, this gasoline-electric system delivers a total of 1,055 brake horsepower and a whopping 848 pound-feet of torque. Pretty impressive, eh?
Storing and releasing electrons as dictated by driving conditions is a battery pack, one with 5.2 kW of power per kilogram of mass. According to McLaren, that's the best power-to-weight ratio of any high-voltage battery system in the automotive industry.
Despite having a gasoline-electric powertrain, the Speedtail is not a plug-in hybrid. Instead, it continuously recharges while driven, though a wireless charging pad is included with the car. It keeps the battery topped up when not in use, trickle-charging it, so the vehicle is ready whenever its owner needs a dose of speed.
Beyond brute power, the Speedtail is also extremely slippery. At around 17 feet long, this three-seater is graced with a carbon-fiber body that supposedly makes it the most aerodynamic McLaren ever offered. This machine also showcases the automaker's ability to cull unnecessary mass, with a claimed dry weight of 3,153 pounds.
Production of the McLaren Speedtail is currently underway. The first 106 examples will be hand built in Woking, England to specific customer specifications. Deliveries of this insanely fast hypercar are slated to begin in February 2020.