While you certainly won’t find us complaining when automakers boast about crazy peak output figures and power-to-weight ratios, it’s always a good idea to put those numbers into perspective. Take the recently released McLaren Senna. Tagged with a name that pays respect to the legendary Brazilian racing driver Ayrton Senna, this machine is offered as the Woking company’s “most extreme” road car ever created. Not only does it have the most powerful engine to ever bless a street-legal McLaren, with 789 horsepower and 590 pound-feet of torque hitting the rear axle by way of a turbocharged 4.0-liter V-8, but its also the lightest street-legal McLaren ever made, tipping the scales at a scant 2,641 pounds thanks to oodles of exotic materials and motorsports-inspired construction. That’s the dry weight, by the way, not the curb weight. The end result is 658 horsepower per metric ton, or 598 horsepower per U.S. ton.