McLaren 675LT Engine Details Released Ahead Of Unveiling: Video Photo:
1997_mclaren_f1_gtr_long_tail_01 Photo: tmr
2015_mclaren_675lt_leak_01_1 Photo: tmr
2015_mclaren_675_lt_650s_teaser_01_3 Photo: tmr
2015_mclaren_675_lt_650s_teaser_02 Photo: tmr
Tony O'Kane | Feb, 05 2015 | 2 Comments

Details of McLaren's upcoming 675LT "Long Tail" have begun dribbling out ahead of its official unveiling at the Geneva Auto Show in March, with the British supercar maker announcing the first morsels of info on the car's engine.

We already knew that the 675LT's engine would boast 496kW (675PS, hence the name), but McLaren has now revealed that peak torque from its 3.8 litre twin-turbo V8 will top out at 700Nm.

The engine will also limit torque to 600Nm in first gear to help preserve traction during standing-start acceleration (and, presumably, reduce strain on the twin-clutch drivetrain). The peak torque figure of 700Nm will also only be meted out between 5500-6500rpm in all other gears.

Engine internals are lighter to improve mechanical efficiency, and the turbocharger trim has been changed to produce more boost. The 675LT's titanium exhaust also helps it shed some pounds.

It all adds up for an appreciable 18kW/20Nm increase over the 650S' already-impressive outputs, and it will be matched by a stripped-out spec that will make the 675LT lighter than the 650S - though McLaren isn't yet saying by how much.

Nor are they talking about performance stats, though we'd assume those headline numbers are being kept in reserve for the car's Geneva appearance.

It's probably safe to say it will be faster than the 650S, though, and given that car accelerates from 0-100km/h in just three seconds flat the 675LT's stats are bound to be scorching.

Handling will also be sharper, and aided in large part by a new rear wing/air brake that produces up to 40 percent more downforce than the 650's aero package.

You can hear the McLaren 675LT's turbo V8 and see its rear wing in the short teaser vid below. For the rest, you'll need to wait until the curtains open at Geneva on March 5.

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