The McLaren is up to 100 hp more potent (here's an independent dyno test showing that the Macca's TT 3.8L delivers up to 850 hp in the real world, albeit with race gas being involved). Perhaps more importantly, it's also well over 500 lbs (250 kg) lighter.
Besides, the Brit's dual-clutch tranny can't even be compared to the automated manual ISR (Independent Shifting Rod) gearbox of the Raging Bull when it comes shift times, with the latter also not being as launch-friendly (it can cause bogging at times).
As for what happens in the quarter-mile confrontation we have here, the Lambo in question is a Roadster, which increases its scale footprint disadvantage. Furthermore, its tires might not be in the best condition, at least judging by how all four wheels struggle to find traction on certain occasions. Inconsistency is the word that best describes the Aventador Superveloce's launches, with the behavior ranging from pulling small wheelies to spinning until the gearbox drops out of the automatic shifting mode, leaving the driver unprepared for the manual labor.
Thus, the extra horses the naturally aspirated 6.5-liter V12 of the Sant'Agata Bolognese machine received via a custom exhaust and a tune might not have the desired effect, at least during the takeoff phase. Note that the McLaren came to the battle in stock form, albeit while using Toyo R888R rubber.
Speaking of which, YouTuber Brooks of the Drag Times channel, who delivered this adventure to us, agreed to give the Lamborghini Aventador SV Roadster a bit of a head start, as you'll notice in the only successful run (out of three), which awaits you at the 5:00 point of the clip below.
Did we say a bit of a head start? We meant a massive lead since the drivers agreed that the McLaren 765LT would only set off once the Lamborghini completed the 60-foot sprint, with the latter's time shown on the drag strip display. And yet we have to warn you that nothing can prepare one for the race's sheer visual impact.