A camouflaged McLaren spotted testing in Michigan has Artura bones and a very different rear. Outlets say it could be the rumored P34 hybrid coupe — or a harder Artura LT before the current car leaves.
McLaren's next road car may already be on US roads. Early October spy photos from Michigan show a black-and-white camouflaged mid-engine car that looks like today's Artura from the side, then breaks the pattern at the rear with a flatter tail, two central exhausts, a fixed wing and a large diffuser (The Supercar Blog, Motorbox). The photos, credited to Instagram account @bigjayscars, don't settle whether this is McLaren's rumored P34 coupe or a last, harder Artura LT.
The front and sides still read as Artura: sculpted side intakes and louvres on the front fenders. The rear is the tell. The Supercar Blog and Motorbox both describe a flatter rear fascia with twin central exhausts, a fixed rear spoiler and a big diffuser — a look both outlets say draws on the M6GT rather than the production Artura's rear.
McLaren has not confirmed the car. Until it does, treat the photos as a real test mule with an unknown program name.
Separately, in September, Automotive News reported on a private dealer briefing that sketched a mid-engine hybrid coupe codenamed P34. That report, carried by Car and Driver, Road & Track and Carscoops, is still the best public description of the project:
Road & Track asked McLaren for comment; a spokesperson said the company could not comment on speculation. So every number above is dealer-sourced reporting, not a McLaren brochure.
How P34 sits next to the 750S is still messy. The same September briefings placed P34 between Artura and 750S, while later October coverage of final 750S orders has some outlets, including Robb Report, describing a V6 hybrid as the 750S replacement. Our longer piece on McLaren's new owners, SUV and McL 6GT walks through that disagreement. The Michigan mule does not resolve it.
Both The Supercar Blog and Motorbox leave open a simpler reading: this could be a track-focused Artura LT, the usual McLaren send-off before a platform retires. That would fit the Artura-shaped body and the harder rear aero without requiring a brand-new car under the wrap. McLaren has already used that playbook on the Super Series with the 788HS as the last limited run on the 720S / 750S platform.
Our October 14 McLaren listing snapshot (US and Canada) puts real numbers under the rumor:
Those are asking prices, not sold prices. A confirmed harder Artura or a cheaper, more powerful P34 would both put pressure on current-model asking prices — especially if buyers wait for the next car.
The photos are useful even if the badge is wrong. McLaren is actively testing a car that keeps the Artura's basic shape while rewriting the rear aero and exhaust layout. That matches a company that has already locked an end date for the 750S in 2027 and promised a faster model cadence under Nick Collins.
The P34 briefings and the Michigan mule are not the same story yet. One is a dealer room sketch from September; the other is a real car on a US highway in early October. Linking them is fair speculation. Treating them as confirmed is not.
What matters for buyers is simpler: McLaren's entry hybrid and its Super Series both have a short remaining life as currently sold, and something more powerful and more expensive than today's Artura is being developed.
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