Design

The evolution of the Supersports’ design is very much a case of ‘form following function’ with new purposeful sculptural forms signalling the engineering changes beneath the skin. For example, the increased power and torque of the W12 engine necessitated additional airflow to the twin turbocharger intercoolers and cooling system. Bentley’s designers responded with a purposeful and dramatic style that features large vertical intake apertures and twin bonnet vents.

Similarly, new flared rear wings that accommodate the 50 mm (2 inches) wider rear track are designed to emphasise the powerful stance of this ultra-high performance coupe. The resultant Supersports style combines the looks of the iconic Continental GT with a new and distinctive appearance that reflects its more extreme character.

The Supersports is further distinguished from its Continental coupe stable mates by a unique dark-smoked steel finish to all exterior ‘brightware’, including front grilles, lamp bezels, window surrounds and wheels. A complex ‘Physical Vapour Deposition’ process is applied to all stainless steel components to give a lustrous and highly durable finish. A car industry first, this process is normally used as a coating on industrial tools, watches and even hip replacement joints.


Flexfuel

Commenting on the new Supersports model, Dr. Franz-Josef Paefgen, Bentley’s Chairman and Chief Executive said: “The Continental Supersports reflects the passion and enthusiasm of Bentley’s engineers and designers. This is the fastest, most extreme Bentley ever, dramatically styled to underline its supercar character. Importantly, it also pioneers the use of FlexFuel technology in the luxury sector.”

The Continental Supersports is capable of running on either petrol and E85 biofuel or any combination of the two. E85 biofuel can offer a reduction of up to 70 per cent in CO2 emissions on a ‘well-to-wheel’ basis. Well-to-wheel is a measurement of a fuel’s net CO2 contribution to the atmosphere, not just tailpipe emissions. It is a way of quantifying how much CO2 a fuel emits from its growth or extraction (well) to its combustion or deployment (wheel). It includes refinement, distillation and transport of the fuel. The fuel supply system detects the blending ratio of the fuel in the tank and ensures that power and torque remain constant regardless of the ratio of petrol to biofuel.

Bioethanol can be derived responsibly from crops such as corn, soybeans, sugarcane and switchgrass. Second generation bioethanol uses the non-food fibres of the plant (biomass), as well as agricultural waste and forestry residues. These are collected and refined into cellulose ethanol. CO2 is absorbed by plants as part of the photosynthesis process, and cars using biofuel then release that CO2 back into the atmosphere, thus creating an unbroken energy cycle. In addition, biofuels are not derived from fossil fuels, making them a renewable resource ensuring a secure supply into the future. Bioethanol is often blended with petrol in a variety of percentages ranging from E10 (10% bioethanol) to the most widely known, E85, blended to a ratio of 85 per cent bioethanol to 15 per cent petrol to ensure cold-start capability. Bioethanol presents unique engineering challenges compared with petrol, due to its chemical composition and characteristics. E85 biofuel has a very high octane rating of 105 but a lower energy content that requires a 30 per cent increase in the engine fuel flow rate.

This necessitated a complete review of the fuel system to identify, and if required replace, components deemed to be insufficiently resistant to the corrosive properties of ethanol. For the fuel system all O-rings, seals, gaskets and pipes are new. In addition, increased fuel flow is achieved through a returnless fuel system and twin variable flow fuel pumps for the engine. The use of bioethanol also requires new valve coatings and hardened valve seat material for additional lubrication, a new closed loop fuel rail design with pressure sensor for higher fuel flow rates and new spark plugs with a wider heat range for slower combustion. The W12 6-litre power unit has the technology to run on petrol, E85 or any mix of these two fuels. A new Fuel Quality Sensor in the fuel supply circuit detects the current mix of petrol and bioethanol in real time. The engine control unit instantly initiates the correct engine mapping to ensure all performance parameters remain balanced and consistent. Power and torque remain constant whatever the ratio of petrol to bioethanol. The result is seamless power delivery in the Bentley tradition.

Heritage

The ‘Supersports’ name is inspired by the original two-seater 3-litre Supersports model introduced in 1925, itself an evolution of the 3-litre Speed. The lightweight, 85 bhp Supersports was the first production Bentley to reach 100 mph and was also renowned for the application of Le Mans-winning race technology. In 1925, Wolf Barnato bought a Supersports which was then the first production car to reach 100 miles per hour.

As one of the famous Bentley Boys, he went on to record back-to-back wins at LeMans three years running from 1928 to 1930. Success in both racing and setting new speed records produced front page headlines. From the outset Bentleys undertook racing as a commercial means to generate publicity and hence sales. The seriousness with which their racing programme was undertaken ensured that W.O. and the ‘Bentley Boys’ established the marque in the eyes of the public at the time and for generations to come.

Engineering

The Continental Supersports began as an ‘under the radar’ project exploring the possibilities of weight reduction on the Continental GT but with more power and torque. A largely experimental process crystallised over a period of 24 months into an official new car programme, driven by the passion and enthusiasm of a small group of Bentley engineers and designers. The results are dramatic. With 630PS (621 bhp) and new ‘Quickshift’ transmission that halves shift times, the Supersports sets new performance benchmarks for Bentley. It accelerates from 0-60 mph in 3.7 seconds (0-100 km/h in 3.9 seconds) onto a top speed of 204 mph (329 km/h).

Supercar performance is complemented by an array of chassis enhancements including retuned steering and suspension, utilising lighter weight components, retuned dampers and anti-roll bars. Agility is further sharpened by the 40:60 rear-biased torque split for the all-wheel drive system, a wider rear track, bespoke lightweight 20-inch alloy wheels and a unique electronic stability programme.

Carbon ceramic brakes are standard fitment, benefiting steering response, grip and ride comfort, while saving weight. Overall, the engineering team have achieved a weight reduction of 110 kg (243 lb) compared with the Continental GT Speed.