Know the Car | MCLAREN 675LT

McLaren 675LT, with LT standing for ‘Longtail’, is the most powerful, fastest and most track focused model in the new McLaren Super Series. It’s also exclusive with only 500 being made, all of which have already been sold.

The LT moniker was last seen almost 20 years ago on the McLaren F1, namely the McLaren F1 GTR. Aerodynamically optimised with greater downforce, the LT mould has worked the same magic on the 675LT, resulting in an incredible 40% increase in downforce compared to the 650S!

The Longtail is a famous name in the history of McLaren, first used on the fastest version of the iconic McLaren F1,’ explains Mike Flewitt, McLaren Automotive Chief Executive Officer. ‘The McLaren F1 GTR ‘Longtail’ was the final highly successful iteration of the F1, and it is an appropriate name for the most exhilarating and driver-focused version of the Super Series. The 675LT is the purest distillation of what McLaren stands for – pure driving pleasure.

So the 675LT is clearly all about performance, performance, performance…and compared to the already high performance 650S, on which it’s loosely based, it’s a completely different animal.

Weight has been reduced by 100kg through extensive use of carbon fibre, a material that is becoming increasingly common in the McLaren series. Components have also been completely revised, with some suspension parts being borrowed from McLaren’s top of the range P1.

The biggest changes however are in the V8 engine, with 50% of it being unique to the 675LT. Upgrades include new more efficient turbos, improvements to the cylinder heads and exhaust manifolds, new camshaft and lightweight connecting rods, plus a faster flowing fuel pump and delivery system.

The result of all this work on the McLaren M838T twin turbo V8 engine is the M838TL, which raises power from 650PS (641 bhp) in the 650S to 675PS (666bhp) in the 675LT. It may not be a massive increase, but combined with the weight loss, the way the power is delivered throughout the rev range is far more impressive and urgent.

The dry weight of the 675LT is just 1,230kg (2,712 lb), meaning a power-to-weight ratio of 549PS per tonne. The sprint from 0-100 km/h (0-62mph) takes 2.9 seconds, 200 km/h (124mph) in 7.9 seconds and top speed is 330 km/h (205 mph).

In comparison the 650S hits 0-100 km/h (62 mph) in 3 seconds and 0-200 km/h (124 mph) in 8.4 seconds. Top speed is actually slightly faster due to the increased downforce on the 675LT at 333 km/h (207mph).

The carbon fibre bodywork surprisingly incorporates technology from Formula 1™, in the form of a new front splitter and nose end-plates. The pop-up airbrake is larger, hence the LT, and the rear deck is also completely new.

Handling and performance is further enhanced through the Active Dynamics Panel rotary switches (see video above for example of them in action), which feature Normal, Sport and Track settings. The 675LT is the closest thing there is to a McLaren P1™,’ explains Mike Flewitt. ‘It is always so engaging and dramatic, and alongside the McLaren P1™ it’s the most extreme expression yet of McLaren road car engineering.

Though brilliant on the track – and likely to be extensively used on track days – the extra engagement and performance is immediately obvious when driving on the road, even at low speeds.Which just goes to show the genius of McLaren’s engineers, the 675LT is just as easy to drive as the 650S on road or track.

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