Final answer:
An interference engine has components that can occupy the same space, risking damage if timing is off. Audi engines are examples of interference engines known for potential piston-valve collision if timing is disturbed.
Explanation:
An interference engine is an engine design where the valves and pistons occupy the same space in the combustion chamber at different times. If the timing of a belt or chain that links the crankshaft and camshaft is off, they can come into contact, leading to severe damage. Audi engines are known to be interference engines, which means if the timing belt breaks, the pistons and valves can collide.
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