you have the claimed figures, you have the equation, you have calculaters... use them and put the matter to rest, its past the poor lassess bed time besides it don't matter, i just read about a bloke that set the new world land speed record for a steam powered car and it was faster than prof's fiat.... to drve a 150mph kettle you got to have stones the size of a mellon!
I sold my old M reg Vento for 300, so it only cost me 550 to upgrade to the Octy - bargain! Its probably even gone up in value too, which makes me smile even more when i look at all the new cars at work depreciating every day I'd rather have three older cars than one new one anyday.