Hello, i'm thinking, why petrol engines (most of them) have less power, when running on lpg (sequential injection)? It's because lpg has lower energy density (lpg propane 25.3MJ/L, lpg butane 27.7MJ/L vs. petrol 34.2MJ/L)? But LPG has higher specific energy: lpg propane 49.6MJ/kg, lpg butane 49.1Mj/kg vs. petrol 46.4MJ/kg. In other forum i read, that gas displace more air in intake manifold or engine than petrol, is it psoible? And LPI (liquid propane injection) realy can solve this problem?
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