Much about the new superhero is already known, detailed in recent weeks as part of McLaren’s teaser campaign, but now the British carmaker has handed down new data to whet some well-heeled appetites.
On the styling front, we see that, as expected, the 675LT is an evolution of the 650S upon which it’s based, but the list of design and aero changes is far from short.
Front-end styling is largely identical across the two models, although small but significant changes can be seen around the front splitter, along with the addition of tall new canards at the flanks.
Futuristic new wheels are a key standout difference, along with a new and more angular panel over the deep side-intake. There’s also a bolder design to the side-sill and lower intake.
Changes at the rear are markedly more obvious, with big new circular exhaust tips, updated tail-lights, a completely redesigned rear panel and a big new diffuser, all topped by that 50 percent larger ‘Long Tail’ airbrake.
New engine venting can also be seen, and there’s now a pair of large brake vents behind the rear wheels.
The interior view is largely unchanged, with only minor trim changes to the steering wheel, dash and slender centre console.
A pair of new carbon-fibre seats, modelled on those of the P1 hypercar, mark the standout difference in the cabin.
The new ‘Long Tail’ is powered by the same twin-turbo 3.8 litre V8 that drives the 650S, matched to a seven-speed SSG transmission, with outputs boosted by 18kW and 20Nm to 496kW (675PS) and 700Nm of torque.
The LT’s drive system limits torque in first gear to a mere 600Nm, however, to preserve traction. Likewise, other gears will see the maximum 700Nm doled out only between 5500 to 6500rpm.
Engine internals are lighter to improve mechanical efficiency, and the turbocharger trim has been changed to produce more boost.
There’s also new cylinder heads and exhaust manifolds, new camshaft and connecting rods, along with a faster fuel system.
In all, a significant 50 percent of the powertrain’s parts, compared to the unit in the 650S, are new - resulting in a new ‘M838TL’ engine code.
The 675LT's titanium exhaust also helps it shed some kilos. How much? An even 100kg, McLaren says, making for a dry weight of 1230kg.
This is thanks largely to a greater use of carbon fibre body panels, lightened engine and new structural components.
The air-conditioning has also been removed, but customers can have it added back in as a no-cost option.
All of this adds up to a 0-100km/h time of 2.9 seconds - just a fraction quicker than the 650S’s 3.0 seconds - but the LT’s 0-200km/h time breaks through the 8-second barrier at 7.9 seconds.
That’s markedly quicker than the 650S’s 8.4 seconds, and also 0.4 seconds quicker than Ferrari’s new 488GTB.
Top speed is 330km/h, and the price is presently undisclosed.