Volkswagen has revealed its replacement for its current 1.4-litre turbo petrol at its annual engineering conference at the Vienna Motor Symposium.
The latest small-capacity turbo petrol grows in capacity to 1.5-litres but is said to be up to 10 per cent more efficient than the engine it replaces.
VW says its new 1.5-litre TSI Evo marks the first time a VGT has been fitted to a mass-market petrol-powered engine (Porsche uses them a fair bit, though), and that compared to the old 1.4, peak torque arrives 35 per cent faster at 1,300rpm. This is good news.
Overall efficiency is up by something like 10 per cent too (although VW hasn’t released any official figures), thanks in part to the VTG, the high 12.5:1 compression ratio and active cylinder deactivation, which shuts down a couple of cylinders when the engine isn’t under too much stress.
Key aspects of what makes the 1.5 different are: it runs on a Miller combustion cycle with a high 12.5:1 compression ratio, has common-rail injection with up to 350 bar pressure, a new thermal management system, cylinder deactivation under low loads and cylinder walls coated in atmospheric plasma spray.
Expect to see the new 1.5 feature in the facelifted Golf, next-generation Polo and a range of other Group models from late 2016.