The Pagani Huayra (Italian pronunciation: [ˈwai̯ra]) is a mid-engine sports car produced by Italian sports car manufacturer Pagani, succeeding the company's previous offering, the Zonda. It is named after Huayra-tata, a Quechua wind god. The Huayra was named "The Hypercar of the Year 2012" by Top Gear magazine. On 11 February 2015 it was reported that the Pagani Huayra has been sold out. The Huayra was limited to just 100 units as part of Pagani's agreement with engine supplier Mercedes-AMG.
The Pagani Huayra was officially debuted online with several pictures in a press release on 25 January 2011. The official world debut was at the 2011 Geneva Motor Show held in March.
The Huayra has a top speed of about 383 km/h (238 mph) and it has a 0-97 km/h (60 mph) acceleration time of 2.8 seconds. Using Pirelli tyres, the Pagani Huayra is capable of withstanding 1.66 g of lateral acceleration
The Pagani Huayra uses a seven-speed sequential gearbox and a single disc clutch. The choice not to use a dual-clutch in an oil bath was due to the increase in weight of over 70 kg (154 lb), thus negating any advantage of the faster gear changes in a double-clutch transmission. As a result, the transmission weighs 96 kg (212 lb).
The car is equipped with Brembo brake calipers, rotors and pads. The calipers have four pistons in front and four in the rear. The rotors are drilled carbon ceramic, 380 mm (15.0 in) in diameter and 34 mm (1.3 in) thick.
The Huayra uses a 6.0 L (5,980 cc) twin-turbocharged M158 60° V12 engine developed by Mercedes-AMG specially for the Huayra, which has a power output of 730 PS (537 kW; 720 hp) at 5,800 rpm and 1,000 N⋅m (738 lbf⋅ft) of torque at 2,250-4,500 rpm. The engine has been designed at the request of Pagani to reduce turbo lag and improve response, achieved with smaller turbo chargers, a different intercooler configuration and re-programmed ECU settings.
Like many high-performance cars, the Huayra uses dry sump lubrication. This has several key benefits including guaranteeing oil flow even when the car is subjected to extreme lateral acceleration, preventing "oil surge" which allows the engine to operate more efficiently while the lack of an oil pan allows mounting the engine lower, lowering the car's center of gravity and improving handling. The fuel consumption of the Huayra is 10 mpg‑US (23.5 L/100 km; 12.0 mpg‑imp) in city and 14 mpg‑US (16.8 L/100 km; 16.8 mpg‑imp) in highway (EPA testing).
A water / oil heat exchanger reduces engine warm-up times on cold days and helps maintain a stable temperature for refrigerants and lubricants.
To minimise the use of pipes and fittings (and the overall weight of the vehicle), the expansion tank is mounted directly on the engine. Intercooler fins act as an expansion tank circuit at low temperatures.
The titanium exhaust system was designed and built by MHG-Fahrzeugtechnik. Hydroformed joints were developed to reduce back pressure and ensure a free flow exhaust. Titanium reduces the weight of the exhaust system while the Inconel silencers improve reliability in the most exposed parts of the exhaust at high temperatures. The entire system weighs less than 10 kg (22 lb).
The Pagani Huayra is different from its predecessor in that it incorporates active aerodynamics. It is capable of changing the height of the front from the ground and independently operating four flaps placed at the rear and front of the car. The behavior of the flaps is managed by a dedicated control unit that is fed information from systems such as the ABS and ECU, which pass on information about the car's speed, yaw rate, lateral acceleration, steering angle and throttle position. This is intended to achieve minimal drag coefficient or maximum downforce depending on the situation. The Huayra's designer Horacio Pagani states that it has a variable drag coefficient of between .31 and .37. The system also prevents excess body roll in the corners by raising the "inside" flaps (i.e. the left ones in a left-handed corner and vice versa), increasing the downforce on that side of the car. The rear flaps also act as an airbrake. Under hard braking, both the front suspension and the two rear flaps are raised to counter-act weight transfer to the front wheels and keep the whole car stable, for instance when entering a corner. Air from the radiator is extracted through an arch in the bonnet at an angle that is designed not to affect the streamline around the body. The side air intakes behind the front wheels create a low pressure zone, resulting in downforce.
After 2 years of development, the Huayra Roadster was officially unveiled at the 2017 Geneva Motor Show.
The over-all appearance of the car has changed, with the most obvious being the removable top (hence the Roadster name). This part of the vehicle is also its key element. The design of the rear is also different, with new eyelid-like fixed flaps that continue with the design and eventually end on the rear lights. The rear engine cover also has a new shape to adapt to the roadster form and now has now has vents for efficient cooling. The wheels are unique and specifically constructed for the car. The car has conventional doors instead of the Gull-wing doors of the coupé as they are impossible to fit on an open top car without maintaining the low weight
The vehicle utilises the same twin-turbocharged M158 V12 engine as the coupé, but it now has a total power output of 764 PS (562 kW; 754 hp) at 6,200 rpm and 1,000 N⋅m (738 lbf⋅ft) of torque at 2,400 rpm. All of this power is delivered to the rear wheels via an all-new 7-speed automatic manual transmission by Xtrac. The car now uses a hydraulic and electronic activation system with carbon synchronizers. Bosch has also contributed in the construction of the car and the car uses their ECU system. The weight is now 70 kg (154 lb) lighter, for a total of 1,280 kg (2,820 lb), making it the first roadster lighter than the coupe version. Only 100 will be made, all of which have already been sold. The tyre supplier is Pirelli, with P-Zero tyres. The tyre have a white narrow outline, resembling those of an F1 race car. Pagani has also used a new material for the Roadster called carbon triax, which is a tri-axis fiberglass meshed with carbon-fibre power bands.
Pagani states that the car produces 816 kg (1,800 lb) of downforce or 1.8 lateral G-force. However, this figure is unproven, but if true, Pagani will have set a new record.
The Huayra BC is a track focused version of the Huayra which was unveiled at the 2016 Geneva Motor Show. The Huayra BC is named after the late Benny Caiola, a friend of Horacio Pagani, and the first Pagani customer. The Huayra BC has an improved version of the standard Huayra's 6.0 L twin-turbocharged V12 engine having a power output of 755 PS (555 kW; 745 hp) as well as 1,100 N⋅m (811 lbf⋅ft) of torque. The dry weight is reduced by 132 kg (291 lb) to just 1,218 kg (2,685 lb), thanks to the use of a new material called 'carbon triax' which Pagani claims is 50% lighter and 20% stronger than regular carbon fibre, giving the car a power-to-weight ratio of 1.62 kg (3.57 lb) per horsepower. The Huayra BC comes with a lighter titanium exhaust system, new aluminum alloy wheels, and a stripped out interior. The tires are Pirelli P-Zero Corsas that feature 12 different rubber compounds, and the suspension and wishbones are made of aeronautical grade aluminum, known as Avional. The Huayra BC also has a new front bumper with a front splitter and winglets, deeper side skirts, and an air diffuser that stretches the entire width of the rear bumper with a large rear wing. All of the exterior components in the car are used to optimize downforce and drag. The Huayra BC uses an all-new Xtrac 7-speed sequential manual transmission. Pagani has stuck with a single-clutch gearbox because it weighs 40% less than double-clutch gearboxes. All 20 units of the Huayra BC coupé have been sold out.
Pagani has developed several special editions of the Huayra upon customer request.
The first special edition was the Pagani Huayra Carbon Edition, unveiled in 2012, along with the White Edition. It features a full carbon fibre body, wheels and interior trim, hence the "carbon" part of the name. The interior features red leather upholstery and carbon fibre inserts. The specifications are the same as the standard Huayra.
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