Toyota NR engine

The Toyota NR engine is a family of small inline-four piston engines designed and manufactured by Toyota, with capacities between 1.2 and 1.5 litres. The series uses an aluminium block and cylinder head with four valves per cylinder and double overhead camshafts, and it carries Toyota Dual VVT-i variable valve timing, with the 8NR using VVT-iW so that it can run in both the Otto cycle and a modified Atkinson cycle for better thermal efficiency. Fuel is delivered by multi-point or direct injection. The 1NR-FE, a compact 1.3 litre engine with stop and start technology, reached the European market in late 2008 in the Yaris, and the 2NR-FE was a 1.5 litre engine developed for the Etios without VVT-i to lower costs. A 1.2 litre turbocharged direct-injection variant first appeared in the Toyota Auris in 2015. In the Transport Atlas it represents Toyota small-displacement engines built for efficiency and emerging markets.