Conventional: While this is called a “conventional” ignition system, it’s something of a misnomer. These are not used on modern cars, at least not in the US. This is an older style of ignition system that uses points, a distributor, and an external coil. They’re high-maintenance, but easily fixed and pretty cheap. Service intervals ranged from every 5,000 to 10,000 miles.
Electronic: An electronic ignition is a modification on the conventional system, and you’ll find these in widespread use today, although distributor-less systems are now becoming more common. In an electronic system, you still have a distributor, but the points have been replaced with a pickup coil, and there’s an electronic ignition control module. These are far less likely to breakdown than conventional systems, and provide very reliable operation. Service intervals on these types of systems are generally recommended every 25,000 miles or so.
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