Land Rover unveils new Discovery What are you talking about? A larger stroke being unreliable? A larger stroke improves durability, due to the fact it's longer, thus being stronger. Yes, a cheaper manufacturing process won't improve reliability, but saying that a longer stroke makes reliability is completely wrong. The only way I can see a longer stroke being unreliable is if the crank is made of weaker materials or something. Why do you think truck engines are so damn durable?