Rolling road results
 

Took s8 to a rolling road in broadstairs. Only 50 quid...318 bhp... 350 ish from factory... not much loss and very good apparently....!! Top speed went to 161mph...on the speed restrictor. Apparently still pulling like a train. Take off restrictor and over 180...! They reckon engine been well looked after....👍🏼😁😎

That's 40 horses escaped though, which is a fair few.

The manuals can make it to 186 (300Kph) unrestricted. Not sure what the auto would do since I don't know anyone who has tried it!

I'd like to put mine on the rollers too since it's only got 13K on the engine. Its been enthusiastically run in so it ought to be making its full factory output :D

Could be due to the auto box, maybe they under-estimated losses from the trans?