Inside, the 2018 Prius welcomes up to five adults to a beautiful, premium interior that combines advanced technology with features that are functional and fun. What the design promises, the engineering delivers: The new Prius is even more fun to drive thanks to a lower centre of gravity that makes the vehicle feel more firmly planted than ever before. At the same time, a new suspension system – one of the benefits of TNGA – dials up driving pleasure. The Hybrid Synergy Drive is built around a 1.8L four-cylinder Atkinson cycle engine and continuously variable transmission.