Volkswagen has introduced a new petrol variant to the Golf range, which it claims offers diesel-like fuel economy but is cheaper to buy. The powertrain used in the Golf 1.5 TSI ACT BlueMotion will soon make its way to other Volkswagen models in the future as well.

The new variant is powered by a 1.5 litre turbocharged four-cylinder TSI Evo engine that makes 128 hp (130 PS) and 200 Nm of torque. The engine runs on the Miller combustion process, and utilises a turbocharger with variable turbine geometry (VTG). This combination of technologies, Volkswagen says, makes the engine 10% more efficient than comparable petrol engines.

Like the more powerful 148 hp (150 PS) 1.5 litre TSI Evo, the new powertrain features the Active Cylinder Management system that deactivates the two inner cylinders when the engine speed is between 1,400-4,000 rpm and at vehicle speeds of up to 130 km/h.

When combined with a seven-speed dual-clutch DSG gearbox, the powertrain is classified as a micro-hybrid system and comes with an ‘eco-coasting’ mode. Operating on a 12-volt electrical system, the engine management system switches off the engine completely and decouples it from the drivetrain by disengaging the clutch.

This happens when the driver lets the car coast, like predictively releasing the accelerator pedal for conditions ahead or when going down a slight slope. During this time, a lithium-ion battery provides the power necessary for the electrical equipment, such as the headlights, windscreen wipers, and infotainment system.

According to Volkswagen, the mode helps reduce fuel consumption by as much as 0.4 l/100 km. Overall, the new Golf variant returns a fuel economy of 4.8 l/100 km (combined), which can go down to as low as 4.0 l/100 km in extra-urban settings.