Pagani Automobili founder Horacio Pagani has a thing for the number five. He frequently creates limited runs of five units of his original Zonda, and the newer Huayra is certain to follow suit. What should be the final units of the model are five Zonda R purpose built for the track. The R sales started in 2009 and this latest iteration shown in Geneva is the best one yet.

The Mercedes-AMG bi-turbo 6.0-liter V-12 engine exclusive to the Zonda in the R develops 739 hp and 524 ft-lbs of torque. The full carbon-fiber-and-titanium R also weighs just 2,360 lbs, so it’s insanely quick. But it’s the little things that make the Zonda R such a monster on the track. Novel to the R is the moveable full-width aero flap on the giant rear wing, good for creating downforces that help avoid guardrails, or for reducing downforce when there’s a glorious straightaway beckoning and overtaking to be done. It will accelerate from zero to 60 mph in 2.5 seconds on to a top speed of 233 mph.

A Japanese gentleman has commissioned this particular car. While the base Zonda R is a cool $1.65 million, this fifth very personalized R costs $3 million pre-tax, which, after taxes in Japan, is north of $5 million.

What performance could possibly be worth that much? Well, the Zonda R lapped the Nürburgring in 6 minutes 47 seconds, a mark surpassed only recently by the Porsche 918 Hybrid. Pagani tells us that this final beauty was tested unofficially — and will go a handful of seconds quicker.