The most important conceptual component of the Golf GTD is the common rail TDI with 170 PS being used in this model series for the first time. The 1,968 cm3 displacement engine is part of a new generation of TDI engines that is more fuel-efficient, low-emitting and more powerful. In parallel, Volkswagen significantly improved the acoustic properties of new generation TDI engines.
The maximum power of the GTD engine lies at 4,200 rpm. Between 1,750 and 2,500 rpm is where the engine – as sporty as it is economical – develops its maximum torque of 350 Newton-meters. Its specific torque is 177.8 Newton-meter per liter displacement. In practically any driving situation, the 16-valve four-cylinder engine offers the power of a sports car engine with six cylinders!
Fuel induction is handled by the latest generation common rail system. Fuel injection pressures of up to 1,800 bar and special eight-hole injection nozzles achieve especially fine atomization of the diesel fuel. The injection nozzles equip the piezo in-line injectors. The electrically controlled piezo crystals – boosted by hydraulics – initiate trigger injection in fractions of a second. Compared to conventional solenoid valves, piezo technology enables greater flexibility in injection processes with smaller, more precisely metered fuel quantities and multiple injections with up to seven individual injections per working cycle. The results are a very quiet and pleasantly smooth-running engine, exceptionally quick response, excellent fuel economy and low emissions. Naturally, the Golf GTD meets limits of the Euro-5 emissions standard.
Engine acoustics are also improved by a fully maintenance-free toothed belt drive for the exhaust camshaft. For the first time on this TDI, Volkswagen is using an exceptionally low-noise, ribbed V-belt covered by an elastomeric film to drive ancillary components. The conversion to common rail technology and numerous other acoustic measures – such as a damping film in the windshield, an extensive noise attenuation package and aero-acoustic fine tuning of the body – have made the new Golf GTD one of the quietest diesels in its class.
Sound – sporty sound – was not exactly a strength of diesel engines until now. However, the GTD's new common rail engine is in fact different. Like the new Golf GTI, the GTD also has an innovative engine sound system that acoustically underscores the engine's power. In addition, the common rail TDI itself has a positive effect on passive safety: Compared to the pump-nozzle TDI of the previous Golf generation, the new turbo-diesel has a significantly lower vertical profile. This improves pedestrian safety, since the engine hood now exhibits a larger deformation area.
Note:
All data and equipment contained in this press release apply to models offered in Germany. They may differ in other countries. All information is subject to change or correction.
TDI, TSI, DSG and Twincharger are registered trademarks of Volkswagen AG or other companies of the Volkswagen Group in Germany and other countries.