The 2004 Opel 1.6i Z16XEP engine is a 1.6-liter (1598cc), 16-valve, 4-cylinder petrol engine found in models like the Astra H, Meriva, Zafira, and Vectra C. It features Dual Overhead Camshafts (DOHC) and Variable Valve Timing (VVT), producing around 103 hp (77 kW) at 5,800 rpm and 147 Nm (108 lb-ft) of torque at 4,000 rpm. It has a bore of 79 mm, a stroke of 81.5 mm, and a compression ratio of 10.5:1.