16 litre airship re-engined Fiat Isotta Fraschini (Land Speed Car - 1905) 

What a machine this is…not for the faint hearted!
At almost 17-feet long with a 16.5-litre straight-six aero (airship!) engine making 250hp. It has around 820lb/ft of torque at very low rpm. Capable of 120mph (max speed of chains not engine!). Was built originally to run land speed records with two engines but now has one large one (very large) and still in regular use!