2015 McLaren 675LT front 3/4 Previously featured on Motorsportchannel.com, the McLaren 675LT is on tap for its world debut at the upcoming Geneva Motor Show. The track-focused, road legal McLaren 675LT (Longtail) is offered in Coupe version only, with a power-to-weight ratio that blows everybody away. With a zero to hundred sprint of 2.9 seconds and top speed of 330 km/h, the 675LT simply proves the point even further.

Styling cues run from the extended carbon fiber front splitter, through an extended door blade and additional cooling intake, to the circular twin titanium exhaust pipes, giving a hint to the performance available for the most powerful and lightest variant in the McLaren Super Series.

Below a newly designed front bumper sits a prominent front splitter, which works the air harder, complementing new front wing end plates to increase downforce levels over the front bodywork. The turbulent air from the front wheel arches is ‘cleaned’ as it flows towards the rear bodywork by sculpted side sills which run the full length of the lower bodywork. A subtle air intake is incorporated ahead of the leading edge of the rear wheel arch, below a more pronounced side intake behind the door, both of which feed clean cool air into the side-mounted radiators.

The re-profiled design flows into the lines of the new carbon fiber rear wings. Two circular exhaust pipes, forged from titanium, exit centrally through exposed bodywork below the rear wing. Despite a more complex design, the bespoke crossover system is designed to optimize performance and reduce weight, saving 1.1kg. The rear deck and sections flanking the exhaust pipes remain exposed; designed to evacuate hot air from the engine bay as efficiently as possible, while a lightweight polycarbonate rear screen features further louvres. A louvred rear bumper reduces air pressure over the rear wheels, while the rear design is completed with a dramatic integrated diffuser.

Taking cues from the McLaren F1 GTR

Inspired by the 1997 McLaren F1 GTR ‘Longtail’, the 675LT takes up where the F1 GTR LT had left off. Thanks to extensive use of carbon fiber on the body panels, along with lightweight engine, chassis and structure parts, and minus air-conditioning, over 100 kilograms have been shaved off the 675LT. Along with the active ‘Longtail’ Airbrake, which is 50 percent bigger than the one fitted to the 650S yet, the 675LT weighs in at just 1,230kg.

Inside, the purposeful driver-focused cabin of the 675LT gives even further indication of track potential. A pair of ultra lightweight carbon fiber-shelled bucket seats, upholstered in Alcantara as standard and modelled on those in the McLaren P1, provide comfort and support with no compromise on overall weight. A subtle 675LT logo features on the headrest of each seat, and is also present on the rev counter. In a change to the other versions in the Super Series, the air conditioning controls are now incorporated within the intuitive touchscreen infotainment system.

More than 50 percent of parts have been changed in the 3.8-liter V8 M838TL engine to deliver increased levels of power (675 PS), torque and driveability with a power-to-weight ratio of 549 PS per tonne. Upgrades include new, more efficient turbos, detail design changes to the cylinder heads and exhaust manifolds, new camshaft and lightweight connecting rods, and a faster-flowing fuel pump and delivery system.

The McLaren 675LT is offered in five bespoke color hues: Silica White, Delta Red, Napier Green, Chicane Grey and the McLaren Orange. Each of the five ‘By McLaren’ specifications is complemented within the stripped out interior with carefully selected materials and colors.

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Edited: McLaren