2018 Audi RS 3: The Ultimate Sleeper Published on March 21, 2017 in First Drives by Gabriel Gélinas Photo: Audi AG 2018 Audi RS 3 - The turbocharged, 2.5-litre five-cylinder engine of the RS 3 is an absolute gem. It features an all-aluminum block, a lightweight crankshaft, an aluminum oil pump and magnesium oil pan.