Kirchheimbolanden, 20 October 2005 – At this year’s IAA International Motor Show in Frankfurt, Volkswagen presented its “Twincharger”, the world’s first dual-charged FSI petrol engine. This revolutionary technology will have its debut in the new Golf GT. The innovative 1.4-litre TSI engine develops its impressive power output from a belt-driven mechanical compressor and a K03 turbocharger from BorgWarner Turbo Systems. The turbocharger with its integrated exhaust manifold and blow-off valve was designed specifically to meet the requirements of the new high-performance power unit. The aim was to reduce fuel consumption and emissions even further, while at the same time providing a generous amount of torque and ensuring outstanding long-term durability for the engine.

The use of dual charging prevents the turbo lag that is otherwise characteristic of small-displacement petrol engines. The principle is fairly simple: the mechanically driven compressor starts to operate in the lower engine speed range, already ensuring a high power output. As the engine speed rises, the mechanical compressor is deactivated and the K03 turbocharger from turbocharger specialists BorgWarner Turbo Systems with its wastegate control system takes over the turbocharging of the engine. The exhaust gas turbocharger is particularly effective in the higher power range, above all due to its optimum efficiency. Therefore, at speeds above 3,500 rpm, the compressor no longer needs to provide support and the turbocharger takes over completely. The result is an exceptionally agile engine that successfully combines outstanding comfort, low fuel consumption and low emissions. This is clearly apparent in the Golf GT: the 125 kW (170 bhp) engine delivers a maximum torque of 240 Nm over the wide speed range of 1,750 to 4,500 rpm. With such an impressive amount of torque available, the engine feels like a much larger, naturally aspirated power unit. Yet, at the same time, it has an overall fuel consumption of just 7.2 litres per 100 kilometres.

The 1.4-litre TSI with 125 kW will be available from November. In addition, a 103 kW (140 bhp) version will be launched in the VW Golf and VW Touran in spring 2006. BorgWarner Turbo Systems will supply the turbocharger for this version too.

Pioneering Engine Concept

With its 2-litre turbocharged direct-injection engine, the Volkswagen Group in collaboration with BorgWarner Turbo Systems has already succeeded in developing the world’s first turbocharged direct-injection petrol engine. This power unit is already being installed in the new Audi A3 Sportback, the Audi A4, the Golf GTI and the VW Passat. Now, the revolutionary 1.4-litre TSI engine will further prove BorgWarner Turbo Systems' exceptional capabilities as a supplier of turbocharging technologies for spark-ignition engines.“We are convinced that the combination of direct injection and turbocharging will offer further great potential for the future,” said Hans-Peter Schmalzl, Vice President Technology at BorgWarner Turbo Systems.

BorgWarner Turbo Systems, a business of the globally active supplier BorgWarner Inc., is one of the world's leading manufacturers of turbocharging systems forpassenger cars and commercial vehicles as well as industrial, locomotive and marine engines. BorgWarner Turbo Systems has a workforce of more than 3,658 employees at twelve locations in eleven countries. The headquarters of the company are located in Kirchheimbolanden, Germany.

Auburn Hills, Michigan-based BorgWarner Inc. (NYSE: BWA) is a product leader in highly engineered components and systems for vehicle powertrain applications worldwide.The company operates manufacturing and technical facilities in 62 locations in 17 countries.Customers include Ford, DaimlerChrysler, General Motors, VW/Audi, Toyota, Hyundai/Kia, Renault/Nissan, Honda, Caterpillar, Navistar International, Peugeot and BMW. The Internet address for BorgWarner is: http://www.bwauto.com.