61.4mpg and 104g/km CO2 makes it a petrol that mimics a diesel.

When Volkswagen introduced the Golf facelift back in November 2016, it briefly mentioned a frugal BlueMotion version equipped with the group’s new 1.5-litre, four-cylinder turbocharged petrol engine. Now, the company has decided to release more details at the Vienna Motor Symposium about the second TSI Evo unit launching this summer in Europe.

Available with the DSG transmission, the more evolved coasting function will completely turn off the engine and it will work at speeds of up to 81 mph. VW promises this will give the ever so popular Golf the characteristics of a hybrid and will reduce fuel consumption in the real world by double the amount today's DSG gearbox coasting functions offer. 

To make this possible, VW’s engineers have implemented a compact lithium-ion battery linked to the Golf’s 12-volt electrics. The battery’s role is to provide power for the infotainment system and such like while the coasting function is active. There’s also a so-called 'Q-diode' responsible for regulating the current flow between the newly added lithium-ion and the vehicle’s regular lead-acid batteries.

2017 VW Golf facelift
2017 VW Golf facelift

When it’s time to turn off the coasting function, VW says the 1.5-litre TSI Evo can be fired up in a number of ways, based on the car’s speed and the situation. The petrol engine resumes its normal operation using the starter, the clutches of the DSG, or both.

As a reminder, this more economical version of the engine is rated at 130 horsepower and 147 pound-feet of torque whereas the beefier configuration pumps out 150 hp and 184 lb-ft.

Fuel consumption in the case of the lower-powered variant is estimated at 61.4mpg, corresponding to 104 g/km of CO2 in the New European Driving Cycle (NEDC). Diesel-like figures from a powerful petrol turbo, in other words. 

Also at the Vienna Motor Symposium, VW introduced a new three-cylinder, 1.0-litre turbocharged petrol engine able to work on compressed natural gas. Set to debut in the all-new Polo supermini, the 1.0 TGI is going to develop 90 hp and will run “in a particularly low-emission manner” on petrol or CNG with the aim to lower CO2 and NOx particulate emissions than previous engines of this kind.

Source: Volkswagen

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