Vehicles with a flexi-engine can run on multiple types of fuels or a mixture of petrol with ethanol or methanol. The FFV-SHEV Corolla Altis takes this a step further as it can run on 100 percent ethanol and also benefits from a Hybrid-electric drivetrain for an even more ecological drive.

from Times of India https://timesofindia.indiatimes.com/auto/news/nitin-gadkari-launches-ffv-hybrid-toyota-corolla-altis-starts-flex-fuel-pilot-project/articleshow/94786427.cms