McLaren did not treat the P1 as a normal follow-up to the F1. The job was harder than that. The company wanted a car that could carry the weight of the F1 name and still stand on its own.

That meant building a hybrid hypercar that could chase a sub-seven-minute lap around the Nürburgring Nordschleife. It also meant making a car that looked fast before it even moved.

The McLaren P1 came with a 903-horsepower hybrid powertrain, a carbon monocoque structure and active aerodynamics. 

Its electric assist system, called IPAS, was built for hard track use, not just brief bursts of speed. 

The car later sat beside the Ferrari LaFerrari and Porsche 918 Spyder in what many car fans call the Holy Trinity of hybrid hypercars.

Designer Frank Stephenson drew from nature while working on the P1. One of his unlikely references was a Caribbean sailfish, the fast ocean fish known for its long body and folding dorsal fin. 

Stephenson saw one mounted on a wall during a vacation and became interested in its shape. He later had a sailfish sent to McLaren in Woking for closer study.

In an interview with the BBC, Stephenson said McLaren’s aerodynamics team scanned it to study how it moved through water. 

The team looked at its scales, which help create tiny vortices and reduce drag as the fish moves. 

That idea later influenced the texture used in the P1’s engine inlet ducts, which helped the car feed air more efficiently to its twin-turbo V8.

The team also studied small foil-like bumps near the sailfish’s tail. These helped smooth water flow toward the fin. 

Stephenson used the same idea on the P1’s mirror supports to improve airflow near the side windows and reduce wind noise.

The P1’s body followed the same thinking. McLaren wrapped the surface tightly around the car’s mechanical parts, with the cockpit placed near the center. 

The result gave the car a low frontal area and helped guide air toward the roof snorkel, engine intake and active aero parts.

Its moving front and rear wings could produce up to 600 kilograms of downforce. That helped the car stay planted at speed and gave the driver more grip on track.

Stephenson also compared the P1’s form to a running cheetah, with skin stretched tightly over muscle. It was not a design made for show alone. Every surface had work to do.

The McLaren P1 became one of the defining hypercars of its era because it mixed engineering with instinct. In this case, part of that instinct came from a fish on a wall.