1.8L 4-Cylinder DOHC 16V VVT-i. All the right ingredients! Environmentally-Friendly Hybrid! If you want an amazing deal on an amazing car that will not break your pocket book, then take a look at this gas-saving 2011 Toyota Prius. This Prius is nicely equipped with features such as 1.8L 4-Cylinder DOHC 16V VVT-i. With a precision-tuned Hybrid engine, it will wring every last mile it can out of a drop of fuel. Awarded Consumer Guide's rating as a 2011 Midsize Car Best Buy. Â