In presenting the new Senna GTR at the Geneva Motor Show this week, McLaren labeled it a “concept.” But it didn’t wait any longer than that to proclaim that it would put the track-bound hypercar into production.

Limited production, that is, at just 75 units. But even if you have the cash to buy one, you can’t. Not because they’re only available to existing Senna customers, but because they’ll all been sold already.

McLaren Automotive CEO Mike Flewitt told Motor Trend that the first 50 were already spoken for on Tuesday when the vehicle was announced – again, as a “concept.” By the end of Wednesday, it was already believed to have been sold out completely.

This despite a price tag reputed by top $1.4 million. For all that scratch, the GTR will upgrade on the (ahem) “standard” Senna with a stiffer suspension, more aggressive aero, and what you can sure will be a stripped-out cockpit with racing shells and harnesses.

No word on powertrain, but you can rest assured the 4.0-liter twin-turbo V8 will produce at least as much as the road-going version’s 814 horsepower and 590 lb-ft of torque. It’s also said to get a “race-style” transmission, but we don’t know if that’ll be a retuned version of the road model’s seven-speed dual-clutch unit, or possibly the six-speed sequential from the 650S GT3 racer.

Either way, it looks like the P1 GTR with its hybrid powertrain may finally be knocked off its perch as the ultimate McLaren track car yet. Shame we can’t have one.

Photos by Guido ten Brink/SB-Medien