The Iroc is powered by a TSI (Twincharger) engine, coupled with the DSG direct shift gearbox. The Twincharger - which is composed by a compressor and a turbocharger - was frst employed in the Golf GT in 2006; TSI engines are claimed by VW to be the most efficient four-cylinder gasoline engines in the world.
The compressor compensates for the typical powering up weaknesses of turbo-only gasoline engines at low rpms. The turbocharger in contrast packs a mighty punch at higher revs.
The TSI version used in the concept achieves 155 kW / 210 hp.