Alpina V8

[Frupal]

I am aware that the Hot-Vee N63TU has its own set of problems. I saw a review of the 2020 B7 that pointed out the significant extra cooling capacity of the Alpina motor. I wonder if this will help to alleviate the typical N63 problems?

[jlin101]

depends on whether the increased cooling capacity is enough to offset the higher boost pressure/horsepower/heat output, and more.

[KK22]

So is it common knowledge that the Alpina is more reliable than the 750? This could be game changing for my next car decision.

[Frupal]

Originally Posted by KK22

So is it common knowledge that the Alpina is more reliable than the 750? This could be game changing for my next car decision.

That is my question.

[BootlegBurton]

I used to work for a large diesel engine manufacturer, and when we would spec a radiator, it would be rated in HP, not engine size. Meaning that heat out put is more dependent on power out put then it is anything else.

So i assume that larger cooling capacity is due to the higher rated power output, not to fix an underlying issue.

Of course, just like bmw, we would give the cooling system a buffer of capacity. We wouldnt put a radiator rated for 400hp on a 400hp engine, we would put a 500hp radiator on a 400hp engine.

Im WAY WAY over simplifying this but thats the just of it. Ive been out of that feild for years now.

[BootlegBurton]

Id also like to add that we would have the identical engine range in power from lets say, 150-450hp. the only difference would be the calibration in the ecu. Every power level would have a different radiator.