The McLaren Senna GTR is the track-only sibling of the road Senna, the most extreme expression of the P15 platform, limited to 75 examples and not registrable for road use in most markets. Freed of road-emissions and homologation constraints, its 4.0-liter twin-turbo M840TR V8 makes 814 bhp (825 PS), and wider bodywork with a larger splitter and diffuser pushes downforce to roughly 2,205 lb (~1,000 kg) at 155 mph, versus about 1,764 lb (~800 kg) for the road car at the same speed.
It rides on full racing slicks (285-section front, 325-section rear, 19-inch), sits lower and runs a wider track than the road Senna, and keeps the 7-speed dual-clutch, rear-wheel-drive layout. The GTR concept was shown at Geneva in 2018 and the production car followed for the 2019 model year; all 75 sold, launching at roughly $1.4 million. Because it is delivered as a track car with no road homologation, it cannot be used on public roads, a buyer warning in itself.
No. It's a track-only car with no road homologation and runs full racing slicks, so it can't be registered for public-road use in most markets. That's the single biggest caveat for anyone expecting street use.
The Senna GTR LM is a separate, even rarer McLaren Special Operations special, just 5 units, with the redline raised to 9,000 rpm. It sits outside the two scoped taxonomy variants (road Senna and Senna GTR).
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