Powertrain. The third generation Saga is powered by Proton's 1.3-litre VVT S4PE engine, a naturally aspirated, four-cylinder, 16-valve DOHC petrol unit with variable valve timing. The 1.3-litre VVT, the sole option in the new Saga, is capable of 94 hp at 5,750 rpm and 120 Nm at 4,000 rpm.