The Toyota Avanza 1.3 1NR engine (specifically the 1NR-FE or 1NR-VE variant) is a 1.3-liter, 16-valve DOHC inline-four petrol engine, often featuring Dual VVT-i (Variable Valve Timing with intelligence on both intake and exhaust). It’s designed for efficiency and reliability, making it a suitable choice for the compact MPV like the Avanza, which prioritizes fuel economy and practical urban/suburban driving. This engine is known for its smooth power delivery and is a key factor in the Avanza’s economical operation.