The Audi S1 is the smallest model of the S model cars. It is available as a 5-door hatchback or a 3-door hatchback and features a front-engine, four-wheel-drive layout. This model was in production from 2015-2019. The S1 is the high-performance variant of the Audi A1 and has a 6-speed transmission and 2.0-litre petrol engine.