What voltage is supplied to the spark plugs of a high compression engine?

The voltage supplied to the spark plugs of a high compression engine typically falls within the range of 25,000 to 30,000 volts. This high voltage is necessary to create a sufficient spark that can ignite the air-fuel mixture in the engine's combustion chamber under increased pressure conditions found in high compression engines.

In these engines, the air-fuel mixture is compressed to a level that necessitates a more reliable and stronger spark to ensure ignition without misfiring. Lower voltages would not generate enough energy to overcome the resistance in the mix, especially when dealing with the challenges presented by higher compression ratios. Hence, the correct voltage range is crucial for optimal performance and efficiency, aligning with the provided answer choice.

The other options, while potentially relevant in different contexts, do not accurately reflect the typical operational specifications for high compression engines, making them less suitable compared to the selected range.