Toyota Avanza with 1200 cc (1.2L) engine uses K3-VE engine, which is a 4 cylinder DOHC (Dual Overhead Camshaft) engine with VVT-i (Variable Valve Timing intelligent) technology. VVT-i helps improve fuel efficiency and engine performance. 

Explanation:

• K3-VE: This is the engine code used on the Toyota Avanza 1.2L.
• 4 Cylinder DOHC: This means the engine has 4 cylinders with two camshafts at the top, which control the intake and exhaust valves.
• VVT-i: VVT-i technology allows the intake and exhaust valves to open and close at different times depending on engine needs, improving fuel efficiency and performance.