Well if both I & E have the same ratio and the commas are really decimal points (european thing) then 10.8/7.25= 1.48, quite a mild ratio.

Also I expect the 258/268 to be ramp to ramp and not the more U.S. .050" lift duration which would be more like 198/208 effective.

I really have no idea what "Valve lift at TDC" is since 1/2mm and 1mm is not a lot (.020" and .040"). Even with the explination. Can someone please interpret in American terns.

ps not sure if this is the Mercedes M112 profile (claims 20 more hp) but sonds like a cam more for toque than revs.