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Message: <blockquote data-quote="ALBundy" data-source="post: 523706" data-attributes="member: 15">Just a few points with all with regards to diesel engines. Diesel engines are more 'hardy' compare to petrol engine due to forged internal components like conrod and crankshaft. This is necessary because of the engine's high compression which can go up as high as 22:1 compare to a petrol engine which usually half of that. Also diesel is not only a fuel but also is a lubricant (oil) and hence it helps to lubricate the piston and etc. Take a drop of diesel and rub it with your index finger and thumb. To those that doubt the longevity of diesel engines look at even the old lorries and buses that emit black smoke all over, they are still on the road from our school days till now. If diesel engines dont last, we wont be seeing these buses and lorries on the road today. The only difference now is with common rail technology and high pressure injectors, the amount of diesel sprayed is precise and the air diesel mixture is more efficient due to the fine mist injection. All this contributed to lower emission and better efficiency. As to why diesel engine is more efficient, two reasons namely diesel contain more chemical energy and it produces a lot of torque and as such the cars are all lowly geared, you can be driving at 200km/hr and the rpm is probably around 3000. So better mileage and better longevity. The 520d is cheaper because some expensive features like active integral steering is not made a standard feature as on the 523. In fact the active integral steering is considered an option in most countries. In a few years to come I believe there will be little discussion on topics like this when everyone is paying 4 or 5 bucks per liter. Just like in Europe now, more than 60% of the cars on the road is diesel. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /></blockquote>

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