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Originally Posted by INF3RN0666
For the average consumer, NO. For commercial use, yes. Let's say your car is part of the police force. If it's a V6, the constant demand on the engine will be overwhelming. If you have a V8, the power is distributed amongst 8 cylinders, and you're less likely to have complete engine failure, but you also have more valves & springs that might need replacement at high mileage. As a general rule (not always true though), V8 deliver more power. More power means that you'll be red-lining the engine less often to accelerate at your desired rate. If you're driving a V6, you'll need to floor the gas further to get the same acceleration. So as you can see, you're placing more demand on a V6 compared to the V8 --> more failure rate. This also depends on the engineering of the engine (no doubt about it).
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I don't see your argument. If an eight-cylinder engine could take abuse longer than an equivalent six-cylinder engine, then why are all over-the-road trucks six-cylinders? I don't believe that the number of cylinders has much at all to do with the durability of the engine, so long as the engine is designed for the abuse it will receive.