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The 720S features McLaren's new M840T engine which is an evolution of the M838T used in the 650S. [9] It is a 3,994 cc (4.0 L; 243.7 cu in) twin-turbocharged V8 engine. [10] [11] The engine has a rated power output of 720 PS (530 kW; 710 hp) at 7,500 rpm, giving the car its name; the maximum torque is 568 lb⋅ft (770 N⋅m) at 5,500 rpm.
The McLaren M840T engine is a 4.0 L (244.1 cu in), 90-degree, twin-turbocharged, flat-plane V8 petrol engine, designed, developed and produced by McLaren, in partnership and collaboration with Ricardo, and introduced with their 720S sports car model, in 2017. It is an evolution of the M838T engine, introduced in 2011.
The 720S is the standard bearer here for McLaren - it is an awesome engineering marvel. But the 720S doesn’t just exist in a vacuum - it exists because McLaren has competitors to battle.
Australia: Since the year 2000, the Federal Government's luxury car tax applies to new vehicles over a certain purchase price, with higher thresholds applying for cars considered as fuel efficient. [3] [4] As of 2019, the thresholds were approximately AU$66,000 (US$50,000) for normal cars and AU$76,000 (US$57,000) for fuel-efficient cars. [5]
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The engine was designed and built for the McLaren MP4-12C, where it produces 600 PS (592 bhp; 441 kW) at 7000 rpm and 600 N⋅m (443 lb⋅ft) at 3000 rpm of torque. In 2012 McLaren released an update increasing power to 625 PS (616 bhp; 460 kW) at 7500 rpm.
The efficiency often reported for a particular engine, however, is not its maximum efficiency but a fuel economy cycle statistical average. For example, the cycle average value of BSFC for a gasoline engine is 322 g/(kW⋅h), translating to an efficiency of 25% (1/(322 × 0.0122225) = 0.2540).
McLaren 720S: 2017 ICE 2.7 s [161] 530 kW Porsche 911 Turbo S (991) 2013 ICE 2.8 s [162] 412 kW Audi R8 V10 Plus 2015 ICE 2.8 s [115] 449 kW Lamborghini Aventador SV: 2015 ICE 2.8 s [163] [164] 552 kW Mercedes-AMG GT 63 S E-Performance: 2022 Hybrid 2.8 s [165] 620 kW Bugatti Veyron: 2005 ICE 2.84 s [166] [167] 736 kW McLaren 570s: 2016 ICE 2.9 ...