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The compression ratio in petrol engine is kept less than in Diesel engine because

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The compression ratio in petrol engine is kept less than in Diesel engine because Answer: higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

Question context

This question is part of ⚙️ Mechanical Eng within the broader 🛠️ Engineering Essentials subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.