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

It is just customary to have less compression ratio in petrol engines
It makes petrol engines lighter
Less compression ratio gives better performance
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition

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Automobile Engineering in ME
Incorrect steering axis inclination (S.A.I.) causes

Generation of a braking effect at tight corners
Poor recovery of the steering wheel after making a turn
The vehicle to pull to the side of lesser inclination
Tendency to assume toe-out orientation

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