The New T-Roc Cabriolet is out now – just in time for the summer.
New Engines
The three eTSI mild hybrid drives of the Volkswagen Golf are world premieres. These are petrol engines that are coupled to a 48 V system plus 7-speed dual clutch gearbox (DSG). A 48 V belt starter generator, a 48 V lithium-ion battery and the latest generation of pioneering, efficient TSI engines mean perfect performance while significantly cutting fuel consumption. The mild hybrid drives will be available with 81 kW/110 PS, 96 kW/130 PS and 110 kW/150 PS. All eTSI models feature a powerful brake energy recuperation function. The 48 V system also makes it possible to coast while the combustion engine has been completely switched off to save even more fuel. Restarting the engine is significantly more convenient thanks to the 48 V system. eTSI models additionally offer extraordinarily good moving-off performance thanks to electric boosts. 48 V mild hybrid drive in detail: the 48 V system will be used in vehicles in addition to the 12 V system. With its relatively small cable diameters and therefore low weight of the wiring harness, it enables the transmission of high electrical power. That leads to recuperation of significantly more energy during braking. The energy stored in the 48 V lithium-ion battery supplies the 12 V vehicle electrical system and drives the 48 V belt starter generator. This belt starter generator takes on the role of the alternator and starter while simultaneously operating as a small, lightweight electric motor that instantly boosts the drive torque when moving off. The output of the generator is transferred by the belt drive.
The basic engine variant for the TSI is a compact three-cylinder engine that weighs just 88 kilograms. Its crankshaft group is so finely balanced that it does without a balance shaft. The small TSI delivers 85 kW/115 PS and 200 Nm maximum torque from its 999 cc displacement, available from 2,000 to 3,500 rpm. It accelerates the T-Roc Cabriolet from zero to 100 km/h in 11.7 seconds, with a top speed of 187 km/h. Fuel consumption is limit. The four-cylinder engine draws its 110 kW/150 PS output from a displacement of 1,498 cc, delivering 250 Nm of torque from 1,500 to 3,500 rpm. This enables the open-top crossover to be accelerated from a standing start to country road speed in 9.6 seconds, going on to reach a top speed of 205 km/h. In the NEDC cycle, the Volkswagen T-Roc Cabriolet 1.5 TSI with manual gearbox consumes an average of 5.7 to 5.5 litres of fuel per 100 km (130 to 125gm of CO2 per km). One factor that enables such a high level of efficiency is the ACT system, which temporarily shuts down two cylinders in the event of a steady driving style.